Automatic merge from submit-queue (batch tested with PRs 44412, 44810, 47130, 46017, 47829)

federation: Cleanup cluster scripts of older federation bring up method

**What this PR does / why we need it**:
Remove older method of bringing up federation via scripts. Currently `kubefed` is the only supported mechanism and is well established and stable.

**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
NONE
```