feat: support custom annotations in principal's service

[jparsai]

Assisted by: Cursor

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/kind bug
/kind cleanup
/kind failing-test
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• Documentation has been updated.

Which issue(s) this PR fixes:

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• E2E Test

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[jparsai]

/test all

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[jparsai]

/test all

[openshift-ci]

@jparsai: The following tests 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/v4.14-kuttl-sequential	484760b	link	false	/test v4.14-kuttl-sequential
ci/prow/v4.14-kuttl-parallel	484760b	link	false	/test v4.14-kuttl-parallel
ci/prow/v4.19-kuttl-parallel	484760b	link	true	/test v4.19-kuttl-parallel
ci/prow/v4.19-kuttl-sequential	484760b	link	true	/test v4.19-kuttl-sequential

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