[WIP] multicluster-engine: remove plugin registries from hardcoded registries.conf

[rporres]

LVMS, ODF, NVIDIA and RHOAI registry entries were hardcoded in the MCE custom-registries ConfigMap even when those plugins are not deployed. Remove them so the existing patch_mce_registries.yaml mechanism adds them dynamically only when the corresponding plugin is actually enabled.

Also drops the legacy openshift-service-mesh-tech-preview and openshift-service-mesh-dev-preview-beta entries, which are no longer needed with servicemeshoperator3.

https://redhat.atlassian.net/browse/MGMT-23873

Summary by CodeRabbit

• Chores
  • Removed multiple unused registry and mirror entries from the multicluster engine disconnected configuration, trimming the configuration by 84 lines and simplifying registry mappings.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 0a6f39a7-acbb-4771-a191-02110fd804a8

📥 Commits

Reviewing files that changed from the base of the PR and between 332c8e5 and 711b228.

📒 Files selected for processing (1)

• operators/multicluster-engine/tasks.yaml

💤 Files with no reviewable changes (1)

• operators/multicluster-engine/tasks.yaml

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Walkthrough

The pull request removes 84 lines of registry and mirror configurations from the disconnected task's registries.conf in operators/multicluster-engine/tasks.yaml. Registry entries removed include lvms4, odf4, rhceph, nvcr.io/nvidia, registry.connect.redhat.com/nvidia, rhcl-1, leader-worker-set, several openshift-service-mesh variants, rhoai, rhelai1, rhaiis, and rhods. Remaining registry/mirror blocks and task structure are unchanged.

Changes

Cohort / File(s)	Summary
Registry Configuration Cleanup operators/multicluster-engine/tasks.yaml	Deleted 84 lines: removed [[registry]] and [[registry.mirror]] blocks for multiple registries (see Walkthrough). Other registry entries and task control flow left intact.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: removing plugin registries from hardcoded registries.conf in multicluster-engine.
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.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch remove-plugins-from-multicluster-engine-registries-conf-MGMT-23873

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[rporres]

/test e2e-disconnected

[github-actions]

Triggered: E2E Disconnected

[github-actions]

Tarball created: quay.io/edge-infrastructure/enclave:b51e07c3777ee40fa7d80575f2e0a23d6501650a (b51e07c)