Automatic merge from submit-queue (batch tested with PRs 45070, 45821, 45732, 45494, 45789)

apiextesions-server integration tests: test multiple registration

**What this PR does / why we need it**:
Add integration test for Multiple registrations XREF: #45511

**Special notes for your reviewer**:
@deads2k my first plan was to submit one single PR for both tests but I'm facing one issue with resources deregistration. Get in touch via slack