Epic: E2E Test Strategy

[camilamacedo86]

🎯 Goal

• Run E2E tests with mock data inside the same repo.
• No need for extra repos for mocks or samples.
• Avoid repeating tests already covered elsewhere.
• Support testing features that are behind feature flags.

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What We’ll Do

• Update kustomize files Make it easy to toggle feature flags on and off during end-to-end (E2E) tests. #1991
  Make it easy to toggle feature flags on and off during end-to-end (E2E) tests.
  - Replace External Catalogs with Test-Only Mock Catalog for E2E #1992
  Create a test-only catalog to replace the usage of default ones, like Community, which we have no control over.
• ✨ e2e: isolate tests with per-scenario dynamic catalogs #2651
  e2e: isolate tests with per-scenario dynamic catalogs; replaces Replace External Catalogs with Test-Only Mock Catalog for E2E #1992

Make sure we have E2E tests for features behind flags:

• Add e2e tests for webhooks support #1994
• Add e2e tests for namespaced install of ClusterExtensions #1995

[tmshort]

Documentation should be added to CONTRIBUTING.md from the design MD file.