Allow setting Clear-Site-Data on OIDC logout

[sberyozkin]

Fixes #46723.

This simple PR allows OIDC users to choose to send one or more Clear-Site-Data directives after the logout request. Even though the PR is simple, I added a release/noteworthy-feature label to draw some attention to it since Clear-Site-Data is a rather new HTTP response header but which can be rather useful.
Also, this PR is done as part of the threat modelling activity.

I also did some minor, test-level only updates to fix a few logout constant names

[gastaldi]

Found a typo, but looks okay to me

[github-actions]

🙈 The PR is closed and the preview is expired.

[sberyozkin]

Hmm, I'm afraid this is the test I added that is flaky, sorry about that, let me fix it

[quarkus-bot]

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It should be safe to merge provided you have a look at the other checks in the summary.

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[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 9a623b4.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

You can consult the Develocity build scans.

[sberyozkin]

OK, let me merge since 2 approvals are available, thanks