ROX-27073: github action for multicluster test

[johannes94]

Description

This PR adds a GHA workflow to run the multicluster e2e tests against 2 infra clusters.

Checklist (Definition of Done)

• Unit and integration tests added
• Added test description under Test manual
• Documentation added if necessary (i.e. changes to dev setup, test execution, ...)
• CI and all relevant tests are passing
• Add the ticket number to the PR title if available, i.e. ROX-12345: ...
• Discussed security and business related topics privately. Will move any security and business related topics that arise to private communication channel.
• Add secret to app-interface Vault or Secrets Manager if necessary
• RDS changes were e2e tested manually
• Check AWS limits are reasonable for changes provisioning new resources
• (If applicable) Changes to the dp-terraform Helm values have been reflected in the addon on integration environment

Test manual

Green CI on all existing + the added jobs is sufficient.

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[ebensh]

Why these specific paths?

[johannes94]

I didn't want to run always because we're going to create 2 clusters for each run.

I selected specifically this paths because the migration logic consists of the API to reassign clusters (thus admin handler and dinosaur service) and the logic to cleanup/reprovision which lives in runtime and reconciler packages.

Thanks for commenting this made me realize that I forgot to change this to paths instead of paths-ignore.

[ebensh]

This is a very minor nit but please put the user over the pw to keep the order consistent

[johannes94]

done.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ebensh, johannes94

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[openshift-ci]

New changes are detected. LGTM label has been removed.