MON-4497: metrics: migrate Prometheus SD from Endpoints to EndpointSlices

[jan--f]

Generated-with-ai: claude sonnet 4.5

[openshift-ci-robot]

@jan--f: This pull request references MON-4497 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the story to target the "4.22.0" version, but no target version was set.

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Generated-with-ai: claude sonnet 4.5

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

@jan--f: 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/unit	4378033	link	true	/test unit
ci/prow/e2e-metal-ipi-ovn-ipv6	4378033	link	true	/test e2e-metal-ipi-ovn-ipv6

Full PR test history. Your PR dashboard.

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