🌱 E2E: Use kind cluster for clusterctl upgrade tests

[lentzi90]

What this PR does / why we need it:

This enables the UseKindForManagementCluster flag for all clusterctl upgrade tests, which makes them use a kind cluster as the secondary management cluster instead of creating an OpenStack workload cluster.

This significantly reduces the resource requirements for these tests by using lightweight kind containers instead of full VMs, and it also speeds up the test execution.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #2098

Special notes for your reviewer:

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

TODOs:

• squashed commits
• if necessary:
  • includes documentation
  • adds unit tests

/hold

[lentzi90]

/test pull-cluster-api-provider-openstack-e2e-full-test

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[lentzi90]

/test pull-cluster-api-provider-openstack-e2e-full-test

[lentzi90]

Looks like it works, and saves a few minutes for the test also!
/hold cancel

[lentzi90]

There is a bit of cleanup we could do after this also, but let's take it separately in case we want to revert for some reason.
The things we can cleanup is this:

• Image upload:

  cluster-api-provider-openstack/scripts/ci-e2e.sh

  Lines 100 to 104 in b9fa78b

  	retry 10 10 scp $(get_ssh_common_args) "${container_archive}" "cloud@${CONTROLLER_IP}:capo-e2e-image.tar"
  	retry 10 10 $(get_ssh_cmd) ${CONTROLLER_IP} -- sudo chown root:root capo-e2e-image.tar
  	retry 10 10 $(get_ssh_cmd) ${CONTROLLER_IP} -- sudo chmod u=rw,g=r,o=r capo-e2e-image.tar
  	retry 10 10 $(get_ssh_cmd) ${CONTROLLER_IP} -- sudo mkdir -p /var/www/html
  	retry 10 10 $(get_ssh_cmd) ${CONTROLLER_IP} -- sudo mv capo-e2e-image.tar /var/www/html/capo-e2e-image.tar

• Image download patches: https://github.com/kubernetes-sigs/cluster-api-provider-openstack/blob/main/test/e2e/data/kustomize/components/upgrade-patches/ci-hack-kct.yaml

These are used to upload the CAPO image that is being tested into the management cluster. All other tests use kind clusters where the image is loaded directly, but the clusterctl upgrade was using a full CAPO cluster so we used this to get the image into it.

[k8s-triage-robot]

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/easycla

[k8s-triage-robot]

Unknown CLA label state. Rechecking for CLA labels.

Send feedback to sig-contributor-experience at kubernetes/community.

/check-cla
/easycla

[lentzi90]

/approve
This is ready to take in

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lentzi90

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[smoshiur1237]

/lgtm