Log prometheus metric registration error and fix CRD metric names

Added windows executable extensions to Kubectl plugins

expose preflight join as phases 

Bump debian-* base images for security fixes

annotate errors in e2e tests

tests: Removed hardcoded images from yaml files

Refactor service-proxy-name label

Currently, the kubectl plugins system - when running under Windows - will determine that a plugin is executable
by looking at its extension, comparing it to '.exe'.

I think we should allow plugins w/ a few more known extensions (.bat, .com, .cmd; for example) -
This would give more of a similar experience to plugins under *nix, where shell scripts are often used.

Moreover, there were two windows-specific behaviors that were redundant,
which I've removed:

1. In plugin.go - There's no need to differentiate between windows and
under OS-es when looking at the PATH variable; It can be refered as 'PATH'
in Windows as well

2. In cmd.go - There's no need to append a suffix when looking up
plugins on windows; One can safely use 'exec.LookPath' without a suffix
on Windows - and get automatic resolving for known executable types

remove cloud provider dependencies to pkg/controller

Delete pods assigned to not existing nodes.

Reverting test to apiserver_request_latencies_summary metric

fix shellcheck in k8s.io/apiextensions-apiserver

fix shellcheck pass in sample-apiserver

Bug fix: ./hack/local-up-cluster.sh is not work on Arm64 platform

Fix TLS config in load test clients

Graduate Pod priority and preemption to GA

Pick up latest json-patch patches

Add missing dependency to zookeeper-install

fix TestEntry

GCE: update addon DaemonSets to select node OS

Signed-off-by: Bin Lu <bin.lu@arm.com>

kubeadm: fix missing 'all' in 'init phase control-plane'

kubeadm: cleanup of phases arguments

kubeadm: Reduce the usage of InitConfiguration

* Return `nil` instead of a pointer to an empty struct when possible,
  before the pointer was introduced the empty struct was required.

* Explicitly accept only one argument maximum for `kubeadm join` as in
  `kubeadm join <master>`.

* Accept no arguments for `kubeadm init`.

* Make phases leafs accept arguments, whereas intermediate phases
  automatically gets set that they accept no arguments.

Add AWS Custom Endpoint capability #70588

Print non-existent key reference in the secret

Add import-restrictions for cloud providers

Use forward plugin instead of proxy plugin in the default configuration of CoreDNS

Fix PV allocation on non-English vSphere