OCPEDGE-2410: feat: add mutable topology featuregate

[eggfoobar]

Add initial feature gate for Mutable Topology as described by EP: openshift/enhancements#2008

[openshift-merge-bot]

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[openshift-ci-robot]

@eggfoobar: This pull request references OCPEDGE-2410 which is a valid jira issue.

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In response to this:

Add initial feature gate for Mutable Topology as described by EP: openshift/enhancements#2008

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[openshift-ci]

Hello @eggfoobar! Some important instructions when contributing to openshift/api:
API design plays an important part in the user experience of OpenShift and as such API PRs are subject to a high level of scrutiny to ensure they follow our best practices. If you haven't already done so, please review the OpenShift API Conventions and ensure that your proposed changes are compliant. Following these conventions will help expedite the api review process for your PR.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository YAML (base), Central YAML (inherited)

Review profile: CHILL

Plan: Enterprise

Run ID: 68fcf136-6af3-487e-9ca0-1c1539674a27

📥 Commits

Reviewing files that changed from the base of the PR and between 1ad2ac3 and 62daf68.

📒 Files selected for processing (10)

• features.md
• features/features.go
• payload-manifests/featuregates/featureGate-4-10-Hypershift-Default.yaml
• payload-manifests/featuregates/featureGate-4-10-Hypershift-DevPreviewNoUpgrade.yaml
• payload-manifests/featuregates/featureGate-4-10-Hypershift-OKD.yaml
• payload-manifests/featuregates/featureGate-4-10-Hypershift-TechPreviewNoUpgrade.yaml
• payload-manifests/featuregates/featureGate-4-10-SelfManagedHA-Default.yaml
• payload-manifests/featuregates/featureGate-4-10-SelfManagedHA-DevPreviewNoUpgrade.yaml
• payload-manifests/featuregates/featureGate-4-10-SelfManagedHA-OKD.yaml
• payload-manifests/featuregates/featureGate-4-10-SelfManagedHA-TechPreviewNoUpgrade.yaml

---

📝 Walkthrough

Walkthrough

This PR introduces a new feature gate named MutableTopology to the OpenShift API. The change consists of declaring the feature gate in the codebase with full metadata and enablement rules, documenting it in the feature gates reference table, and applying its configuration across multiple payload manifest files for different cluster profiles and deployment environments.

Suggested reviewers

• JoelSpeed
• everettraven
• knobunc

🚥 Pre-merge checks | ✅ 6 | ❌ 9

❌ Failed checks (9 inconclusive)

Check name	Status	Explanation	Resolution
Stable And Deterministic Test Names	❓ Inconclusive	Custom check execution failed before a final verdict was produced.	Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
Test Structure And Quality	❓ Inconclusive	Custom check execution failed before a final verdict was produced.	Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
Microshift Test Compatibility	❓ Inconclusive	Custom check execution failed before a final verdict was produced.	Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
Single Node Openshift (Sno) Test Compatibility	❓ Inconclusive	Custom check execution failed before a final verdict was produced.	Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
Topology-Aware Scheduling Compatibility	❓ Inconclusive	Custom check execution failed before a final verdict was produced.	Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
Ipv6 And Disconnected Network Test Compatibility	❓ Inconclusive	Custom check execution failed before a final verdict was produced.	Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
No-Weak-Crypto	❓ Inconclusive	Custom check execution failed before a final verdict was produced.	Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
Container-Privileges	❓ Inconclusive	Custom check execution failed before a final verdict was produced.	Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.
No-Sensitive-Data-In-Logs	❓ Inconclusive	Custom check execution failed before a final verdict was produced.	Retry the review run. If this persists, inspect pre-merge custom-check logs for infrastructure or agent runtime failures.

✅ Passed checks (6 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: adding a mutable topology feature gate, which aligns with all modifications across multiple files.
Description check	✅ Passed	The description is directly related to the changeset, explaining that it adds an initial feature gate for Mutable Topology with reference to the enhancement proposal.
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.
Ote Binary Stdout Contract	✅ Passed	PASS: The PR only edits feature-gate registrations/manifests; touched Go code has no main/init/TestMain/RunSpecs or stdout-printing calls, and helper builders are silent.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

Warning

There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure.

🔧 golangci-lint (2.12.2)

Error: build linters: unable to load custom analyzer "kubeapilinter": tools/_output/bin/kube-api-linter.so, plugin: not implemented
The command is terminated due to an error: build linters: unable to load custom analyzer "kubeapilinter": tools/_output/bin/kube-api-linter.so, plugin: not implemented

---

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[eggfoobar]

/retest-required

[openshift-ci]

@eggfoobar: all tests passed!

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