[EPIC] CI/CD for Management cluster creation

[cornelius-keller]

User Story:

• As a giant swarm developer I want my changes to CAPO management cluster creation to be tested automatically so that I am sure I don't introduce a regression

Tasks

• split cluster configuration and creation steps in mc-bootstrap #1354
• make mc-bootstrap executable in a pod/container so that we can use it in CI #1383
• https://github.com/giantswarm/giantswarm/issues/23743
• Create & Adapt mc-bootstrap CI Pipelines for all providers #1638
• Create smoke tests for mc-bootstrap CI #1639

Acceptance criteria

• If a make a change to the mc-bootstrap repository there is a CI job running that makes sure managment cluster creation is still working for
  • CAPO
  • CAPG
  • CAPA
  • CAPVCD
  • CAPV
• These jobs are executed also on a regular basis to make sure that changes done outside of mc-bootstrap (app-collections) don't affect management cluster creation

[cornelius-keller]

@ericgraf please explain current status and current limitations

[gawertm]

next steps for this Epic:

1. finish the current tekton pipelines
2. make it work on all providers
3. run basic smoke test on top (we can re-use some of the smoke tests defined in the past)

smoke-test: all apps are created (collection is reconciled at some point), api server up and running, capi & provider components up & running)

follow-ups after this epic:

• test that WC creation works from that MC
• CNCF conformance tests
• CIS benchmarks

[gawertm]

@yulianedyalkova FYI. this is the epic that we have in Rocket on the CI topic, @ericgraf worked on for a while already. let me know if you want to move it to your project or re-create and we can close this one here :)

[yulianedyalkova]

Closing in favour of #2119.