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[Federation] Move sync controller

This PR moves the sync controller to its own package in support of parallel efforts to use it for more types than just secrets.

The secret controller unit tests have been retained for now.  Once good unit test coverage exists for the sync controller, the existing secret controller unit testing can go away.

cc: @kubernetes/sig-federation-pr-reviews @perotinus

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fix typo TerminalSize

**What this PR does / why we need it**:
fixes typo in comments

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
```

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[Federation] Add federated type registry

This PR adds a registry for federated types. The goal is to simplify the consumption of federated type configuration by controllers/integration tests/e2e tests/upgrade tests.  Consumers can iterate over ``fedtypes.FederatedTypes()``, as per the usage in the crud integration test and controller manager in this PR.

The previous name for the the adapter package - ``typeadapters`` - has been changed to ``fedtypes`` to reflect the fact that more than just type adapters are defined there.  I'm happy to take suggestions on the name, ``fedtypes`` was just the first thing that came to mind. 

cc: @kubernetes/sig-federation-pr-reviews

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change event count type

event count type had better to be uint.

thx all.

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fix typo in build/common.sh

**What this PR does / why we need it**:
It fixes the typo in comments in `build/common.sh`:
- backgound -> background
- stoped -> stopped

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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vendor: Update elazarl/goproxy to fix e2e test with go1.8

**What this PR does / why we need it**:

This updates the dependency `github.com/elazarl/goproxy` to include this fix https://github.com/elazarl/goproxy/commit/c4fc26588b6ef8af07a191fcb6476387bdd46711 which makes kubernetes e2e tests build with go1.8. It was crashing before as described in https://github.com/elazarl/goproxy/issues/188#issuecomment-281092250 and #38228

**Which issue this PR fixes**

This is part of the fix for #38228 

**Special notes for your reviewer**:

**Release note**:

```release-note
```

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delete ubuntu kube-up

```release-note
Remove deprecated ubuntu kube-up deployment.
```

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delete ovirt kube-up

untouched since 2014. I'm not sure what this file is.

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Use OS-specific libs when computing client User-Agent in kubectl, etc.

**What this PR does / why we need it**:

The User-Agent reported by clients (e.g. kubectl) in request
headers should include the name of the client executable
but not the full path to that executable.

This PR changes how this name is determined by using the
operating-system specific package "path/filepath" (meant for
working with file system paths) instead of the "path" package
(meant for URL paths).

This fixes a problem on the Windows OS in the case where, if the
user has not set their PATH to point to the location of their
client executable, the User-Agent includes the full path - which
is unnecessary.

Fixes: #44419

```release-note
Use OS-specific libs when computing client User-Agent in kubectl, etc.
```

Automatic merge from submit-queue (batch tested with PRs 44364, 44361, 42498)

Fix the certificate rotation threshold and add jitter.

Adjusts the certificate rotation threshold to be fixed, with some jitter to
spread out the load on the Certificate Signing Request API. The rotation
threshold is fixed at 20% now, meaning when 20% of the certificate's total
duration is remaining, the certificate manager will attempt to rotate, with
jitter +/-10%. For certificates of duration 1 month that means they will
rotate after 24 days, +/- 3 days.

On a 6000 node cluster, assuming all nodes added at nearly the same time, this
should result in 6000 nodes rotating spread over 6 days (total range of the
jitter), or ~42 nodes / hour requesting new certificates.

Automatic merge from submit-queue (batch tested with PRs 44364, 44361, 42498)

Move v1 helpers

The first 3 commits are other PRs.

This PR move pkg/api/v1/helpers.go to a subpackage, which is almost symmetric to #44296, where pkg/api/helpers.go was moved.

This PR is mostly mechanic, except that
1. moved the 3 methods of Taint and Toleration to pkg/api/methods.go
2. moved constants and types defined in v1/helpers.go to pkg/api/v1/annotataion_key_constants.go and nonstandard_types.go
3. updated staging/copy.sh to copy pkg/api/helpers to client-go, it's otherwise removed from client-go because no other code in client-go depends on the package. Some test code in pkg/controller imports client-go/pkg/api/helpers. After moving api types to its own repo, we can remove these copies of utility function from client-go and ask users to use the ones in the main repo.

(This PR breaks a cyclic import problem i met when I tried to move global variables pkg/api/Scheme and Registry to a subpackage)

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bazel: delete deb that doesn't build

cmd/kube-aggregator is long gone.

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Add a few missing binaries to the Bazel SERVER_TARGETS list

**What this PR does / why we need it**: catches up our Bazel build with #41413 and #40204.

If you have clever ideas of how to keep the lists in `build/release-tars/BUILD` and `hack/lib/golang.sh` in sync I'd love hear them.

**Release note**:

```release-note
NONE
```

/assign @spxtr @mikedanese

**What this PR does / why we need it**:

The User-Agent reported by clients (e.g. kubectl) in request
headers should include the name of the client executable
but not the full path to that executable.

This PR changes how this name is determined by using the
operating-system specific package "path/filepath" (meant for
working with file system paths) instead of the "path" package
(meant for URL paths).

This fixes a problem on the Windows OS in the case where, if the
user has not set their PATH to point to the location of their
client executable, the User-Agent unnecessarily includes the
full path.

Fixes: #44419

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Fix failing cluster-autoscaler e2e

Fix a panic in 2 CA e2e.
```release-note
```

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fix cross-build

Fix https://github.com/kubernetes/kubernetes/pull/41543#issuecomment-294207870

Automatic merge from submit-queue (batch tested with PRs 40777, 43673)

remove an unnecassary variable assignment in glusterfs_test

**What this PR does / why we need it**:
`path` is exactly the same variable as `volumePath`, which is defined in line 122 . So no needs to assign it.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
```

Automatic merge from submit-queue (batch tested with PRs 40777, 43673)

create multiple BUILD files in vendor.

this should reduce the rebase misery that is vendor/BUILD.

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Make controller Run methods consistent

- startup/shutdown logging
- wait for cache sync logging
- defer utilruntime.HandleCrash()
- wait for stop channel before exiting

Please review for accuracy and consistency.

cc @deads2k @wojtek-t @smarterclayton @sttts @mikedanese @liggitt @rrati @derekwaynecarr

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Removed un-necessary empty line.

- startup/shutdown logging
- wait for cache sync logging
- defer utilruntime.HandleCrash()
- wait for stop channel before exiting

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Fix resource gatherer

Automatic merge from submit-queue (batch tested with PRs 44414, 44318)

Finish migration to edge-based for endpoints in KubeProxy

Ref #43702