Automatic merge from submit-queue (batch tested with PRs 41134, 41410, 40177, 41049, 41313)

[Federation][Kubefed] Bug fix relating kubeconfig path in kubefed init

**What this PR does / why we need it**:
Fixes https://github.com/kubernetes/kubernetes/issues/41305

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
https://github.com/kubernetes/kubernetes/issues/41305
The kubeconfig explicit path is not updated correctly when supplied through the --kubeconfig flag in kubefed init. This leads to the details about the initialised federation control plane not getting updated in the correct kubeconfig file.

**Special notes for your reviewer**:
@madhusudancs 

**Release note**:

```
Fixed a bug that caused the kubeconfig entry for the initialized federation control plane to be not written to the supplied kubeconfig file when the file was supplied through the --kubeconfig flag.
```