Automated cherry pick of #72030: Fix race condition when joining nodes

Automated cherry pick of #72123: kubeadm: fix nil check in join config creation

Automated cherry pick of #71945: kubeadm: fixed etcd sync endpoints

Despite we were checking for the kubelet kubeconfig file to be present, the
kubelet first writes this file and then the certificates the kubeconfig file
refers to. This represents a race condition in kubeadm in which when we confirm
that the kubelet's kubeconfig file is present we continue creating a clientset
out of it. However, the clientset creation will ensure that the certificates the
kubeconfig file refers to exist on the filesystem.

To fix this problem, not only wait for the kubelet's kubeconfig file to be
present, but also ensure that we can create a clientset ouf of it on our polling
process, while we wait for the kubelet to have performed the TLS bootstrap.

Automated cherry pick of #71923: diff: Fix overlapping filenames

Automated cherry pick of #71980: Disable proxy to loopback and linklocal

Automated cherry pick of #71755: Allow kube-scheduler to tolerate cluster auth config lookup

Automated cherry pick of #71713, #71857: Plumb token and token file through rest.Config

The filename can overlap when multiple resources have the same name (but
obviously are of a different type). Include the name of the type in the
file name to prevent the overlap.

Automated cherry pick of #71854: apply: fix detection of non-dry-run enabled servers

Automated cherry pick of #71551: activate unschedulable pods only if the node became more

Set delete propagation policy to background when removing jobs and its dependents 

Automated cherry pick of #71941: add VMSize info in attach/detach azure disk

Include BGPConfiguration

Automated cherry pick of #71515 upstream release 1.13

Automated cherry pick of #71803: Use kubeconfig flag instead of kubeconfig-dir in kubeadm init

Apply only checks that the server supports dry-run in the create path,
not the update path, which is pretty bad.

Automated cherry pick of #70756: Add e2e test for file exec #71625: Volume exec file test: added NodeSelector to pod

Automated cherry pick of #71522: Use Node-Problem-Detector v0.6.0

Automated cherry pick of #70392: Lookup PX api port from k8s service

Automated cherry pick of #71736: Fix Azure node's internal IP address

[1.13.1] Automated cherry pick of #71601: Surface help for insecure ports to explain how to disable

Needed for calico 2.x to 3.x upgrade.

The current logic is to delete a RS if the number of active connections
is 0. This makes sense for TCP but for UDP the number of active
connections is always 0. This is an issue for DNS queries because the RS
will be deleted but the IPVS connection will remain until it expires
(5mn by default) and if there are a lot of DNS queries, the port will be
reused and queries blackholed. Of course for this to work properly the
service needs to continue to serve queries until the connections expire
(this works fine with the lameduck option of coredns).

Help distinguish UDP and TCP RS (useful for DNS which uses both)

Update Cluster Autoscaler version in gce manifests to 1.13.1

Automated cherry pick of #71805: Fix sort-by regression

Automated cherry pick of #71722 upstream release 1.13