ROX-30918, ROX-31049: Update labels, fix docker mediaType / 4.8

[msugakov]

This change backports #2300 to release-2.37 branch. Was tested on master.
This also backports #2293.

[msugakov]

/cancel

[msugakov]

/retest scanner-db-on-push

[openshift-ci]

@msugakov: The /retest command does not accept any targets.
The following commands are available to trigger optional jobs:

/test e2e-tests

/test slim-e2e-tests

Use /test all to run all jobs.

In response to this:

/retest scanner-db-on-push

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[openshift-ci]

@msugakov: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-tests	f81d870	link	false	/test e2e-tests

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[msugakov]

check.sh output against 2.37.5-45-gf81d870672-fast confirms it's ok. Merging.