Automatic merge from submit-queue (batch tested with PRs 50893, 50913, 50963, 50629, 50640)

kubeadm: Add back labels for the Static Pod control plane (attempt 2)

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

Exactly the same PR as https://github.com/kubernetes/kubernetes/pull/50174, but that PR was appearently lost in a rebase/mis-merge or something, so resending this one.

**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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