Automatic merge from submit-queue (batch tested with PRs 67160, 67090, 67159, 66866, 62111). 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>.
Remove references to `pkg/apis/componentconfig/install` and fix inconsistencies
**What this PR does / why we need it**:
This PR fixes a bunch of problems with the (deprecated, monolithic, to be removed) componentconfig API group:
- As discussed with @liggitt, the current structure of k-c-m componentconfig types is really bad, and we don't want anyone to think it can be serialized (not that we have any such code, but anyway). So we deciided to remove all JSON tags from the types to be consistent, register the violations, then move types out, get the structure right, and **first then** add JSON tags.
- There should not be an `install` package for componentconfigs that installs stuff in `legacyscheme`, removed the package and references to it.
- Added myself and @sttts to approvers for `pkg/apis/componentconfig`, which we intend to remove in favor for dedicated API groups in different staging repos.
- Removed the componentconfig types from the API testing in `pkg/api/testing`, that roundtrip and defaulting testing will exist in the dedicated API groups instead. Added a TODO to add roundtrip, defaulting and type tag testing later.
- Made the `register.go` files more consistent to the common template.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
ref https://github.com/kubernetes/community/pull/2354
**Special notes for your reviewer**:
This PR must merge before https://github.com/kubernetes/kubernetes/pull/66722 and https://github.com/kubernetes/kubernetes/pull/66993
**Release note**:
```release-note
NONE
```
@kubernetes/sig-api-machinery-pr-reviews @kubernetes/sig-cluster-lifecycle-pr-reviews
/assign @sttts @thockin @jbeda @liggitt
8ef73ecf99