fix golint failures for pkg/apis/...

Fix panic because VolumeSpec may be nil in volume reconstruction scenario

Code cleanup and refactoring

kubeadm/phases: use common interfaces for init and join phases

Fix lint on pkg/kubelet/server/...

Allows to combine the `-f` and `-l` flags in kubectl logs

Mark PriorityClass v1beta1 and v1alpha1 deprecated by v1 API

fixgo lint failures test/integration/...

Merge pull request #74420 from mattjmcnaughton/mattjmcnaughton/fix-shellcheck-for-more-scripts-in-hack

Fix shellcheck for more scripts in hack

Fix shellcheck lint errors in Kubemark scripts

Promote aggregator e2e test to conformance

The custom sub-set interfaces in init/join phases as a pattern
have isolation benefits - e.g. when a consumer imports these
but we don't want them to be able to call all methods from
the original object that satisfies a complete interface.

On the other hand these sub-set interfaces under phases/init
and phases/join are private.

Expose a couple of new common interfaces:
- InitData from phases/init/data.go
- JoinData from phases/join/data.go

Use these interfaces in init/join phases accordingly instead
of the sub-set interfaces.

Use compile-time type assertion to verify that these
interfaces can be satisfied by init.go's initData and
join.go's joinData.

Add NO-OP objects called testInitData and joinInitData
that can be used for unit testing if embedded.

Fix typos

Ignore the sticky setgid bit when a test is running on memory EmptyDir

kubeadm cleanup: master -> control-plane (cont.4)

Fix shellcheck lint errors in cluster and hack scripts

kubelet: upgrade sourceFile to use fsnotify

Disable Windows Defender on Windows nodes.

Fix some shellcheck failures in hack

Register openstack provider for e2e test

Fix shellcheck for hack/verify-generated-*

Add readonly volume tests for windows

Update vendor prometheus/common/... to latest release

Remove unused GetDefaultBackendNodePort()