Automatic merge from submit-queue (batch tested with PRs 53444, 52067, 53571, 53182). 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>.

revamp replicaset integration tests

**What this PR does / why we need it**:
This PR revamps existing replicaset integration tests. Some unit tests have been converted to integration tests.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #51484

**Release note**:

```release-note
NONE
```

**TODO List**:
- [x] add an integration test to verify scale endpoint works
- [ ] convert testReplicaSetConditionCheck() to integration test, and modify the test as replicaset's condition has been removed
- [ ] ~~HPA-related replicaset integration test (may be better suited under HPA integration tests)~~
- [x] verify all tests from "Suggested unit tests to retain" list of the internal doc will not be converted to integration tests, or convert the tests accordingly
- [ ] ~~refactor sync call tree (refer deployment and daemonset PRs)~~
- [x] further improve written integration tests (revise test strategies, remove redundant GET / UPDATE calls, add more relevant sub-tests)
- [x] remove unit tests that have overlapping testing goals with written integration tests