Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

e2e node framework can generate a base kubelet config file

Fixes #57980

This allows the e2e node test framework to generate a Kubelet config file containing the defaults it would typically pass to a test via flags, rather than passing these defaults as flags.

```release-note
NONE
```