Add ClusterManagementAddOn resource and E2E test

[FilipB]

Adds ClusterManagementAddOn resource to register the addon with OCM's addon-manager. The resource is deployed via Helm and declares this as a hub-only addon with manual installation strategy.

• Set installStrategy.type=Manual (no auto-deployment to clusters)
• Add E2E test to verify ClusterManagementAddOn is created with correct metadata

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: FilipB

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[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: 33adf74b-fb63-464a-93b8-a0fdac3cf261

📥 Commits

Reviewing files that changed from the base of the PR and between 8b3dd53 and 62f099f.

📒 Files selected for processing (3)

• chart/templates/clustermanagementaddon.yaml
• test/e2e/mesh_lifecycle_test.go
• test/e2e/suite_test.go

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📝 Walkthrough

Walkthrough

Adds a ClusterManagementAddOn manifest for multicluster-mesh-addon with v1beta1 metadata, display name, description, and manual install strategy. The e2e suite registers the addon v1beta1 types in the scheme and adds a test that fetches the resource from the hub and checks those fields.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Suggested labels

lgtm

Suggested reviewers

• sridhargaddam
• jewertow

🚥 Pre-merge checks | ✅ 8

✅ Passed checks (8 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change by mentioning the new ClusterManagementAddOn resource and the E2E test.
Description check	✅ Passed	The description matches the changeset and correctly explains the addon registration and manual install strategy.
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.
No-Sensitive-Data-In-Logs	✅ Passed	Touched files only log test-step text and cluster/namespace names; no passwords, tokens, API keys, auth headers, or secret values are logged.
Stable And Deterministic Test Names	✅ Passed	The added Ginkgo titles are static strings like "Addon registration" and "should have ClusterManagementAddOn registered"; no dynamic values appear in titles.
No-Weak-Crypto	✅ Passed	Changed files are YAML/test only; scans found no MD5/SHA1/DES/RC4/3DES/Blowfish/ECB or custom crypto/secret-comparison code.
Container-Privileges	✅ Passed	The new ClusterManagementAddOn manifest is metadata-only, and the changed files add no privileged/hostPID/hostNetwork/hostIPC/SYS_ADMIN/allowPrivilegeEscalation settings.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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