ARO-HCP: remove outdated CI README

[gmfrasca]

Summary

Removes ci-operator/config/Azure/ARO-HCP/README.md which documented an obsolete workflow with step names that no longer exist. All ARO-HCP CI documentation now lives in the ARO-HCP repo.

Follow-up from #81044

Summary by CodeRabbit

• Removed the obsolete ARO-HCP CI configuration README from the OpenShift CI repository.
• Redirected documentation ownership to the Azure/ARO-HCP repository, where current CI guidance is maintained.

[coderabbitai]

Walkthrough

Removed the ARO-HCP CI operator README covering production-region additions, example jobs, generation commands, PR workflow, and validation instructions.

Changes

Cohort / File(s)	Summary
ARO-HCP Documentation ci-operator/config/Azure/ARO-HCP/README.md	Deleted the ARO-HCP production-region testing configuration guide and its associated examples and instructions.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 15

✅ Passed checks (15 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Stable And Deterministic Test Names	✅ Passed	Only ci-operator/config/Azure/ARO-HCP/README.md was deleted; no test titles or Ginkgo specs changed.
Test Structure And Quality	✅ Passed	This PR only deletes a README; no Ginkgo test code was added or modified, so the test-quality check is not applicable.
Microshift Test Compatibility	✅ Passed	Only ci-operator/config/Azure/ARO-HCP/README.md was deleted; no Ginkgo tests or OpenShift API usage changed.
Single Node Openshift (Sno) Test Compatibility	✅ Passed	Only a README was deleted; no Ginkgo tests or runtime changes were added, so there are no new SNO compatibility concerns.
Topology-Aware Scheduling Compatibility	✅ Passed	Only ci-operator/config/Azure/ARO-HCP/README.md was deleted; no manifests, operator code, or controllers were changed.
Ote Binary Stdout Contract	✅ Passed	Only ci-operator/config/Azure/ARO-HCP/README.md was deleted; no process-level code or stdout paths changed.
Ipv6 And Disconnected Network Test Compatibility	✅ Passed	PR only deletes a README; no Ginkgo tests, networking code, or external connectivity were added.
No-Weak-Crypto	✅ Passed	Only change is deleting a README; no crypto code or comparisons were added or modified.
Container-Privileges	✅ Passed	Only change is deleting a README; no container/K8s manifests were added or modified, and no privileged settings appear in the diff.
No-Sensitive-Data-In-Logs	✅ Passed	The only change deletes a README; the diff shows no logging code or sensitive data like passwords, tokens, PII, or internal hostnames.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: removing an outdated ARO-HCP CI README.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: gmfrasca
Once this PR has been reviewed and has the lgtm label, please assign roivaz for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• ci-operator/config/Azure/ARO-HCP/OWNERS

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[openshift-ci]

@gmfrasca: all tests passed!

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