Upgrade test action for EventMesh Backend

[grischperl]

Description

To ensure full test coverage of the EventingManager, the upgrade flow with EventMesh Backend needs to be tested.

Job Flow

• Install gardener cluster
• Deploy eventing-manager (latest release)
• Create Eventing CR with EventMesh
• Run end-to-end tests (make e2e-eventing-setup and make e2e-eventing)
• Update eventing-manager to PR version
• Run end-to-end tests (make e2e-eventing)
• Clean up (make e2e-eventing and make e2e-cleanup)

Useful Links

• Reusable action is done in BTP Manager here and is called here to be executed on PRs
• The secrets for EM, IAS and Gardener need to be stored securely. This is solved in issue CI pipeline for backend switching tests #131
• The issue E2E test with EventMesh Backend #381 runs the E2E tests with EventMesh backends

Acceptance

• GithubAction executes upgrade test with EventMesh backend on PRs on main and release-* branches
• Action is reusable in other actions, f.ex the release flow

[github-actions]

This issue has been automatically marked as stale due to the lack of recent activity. It will soon be closed if no further activity occurs.
Thank you for your contributions.

[github-actions]

This issue has been automatically marked as stale due to the lack of recent activity. It will soon be closed if no further activity occurs.
Thank you for your contributions.

[github-actions]

This issue has been automatically closed due to the lack of recent activity.
/lifecycle rotten