Ensure CAPI resources are preserved after migration

[salasberryfin]

Description

As a Turtles user, I need to safely migrate to Rancher >=v2.13.0, and effectively Turtles >=v.0.25.0, from Rancher v2.12.x and Turtles (as extension) v0.24.2, and my CAPI resources should not be affected.

Definition of Done

A new test will cover a scenario where:

1. Rancher v2.12.x is installed with Turtles v0.24.2.
2. CAPIProvider and CAPI Cluster resources are created.
3. Once resources are available, user upgrades to Rancher v2.13.x, which ships with Turtles v0.25.x.
4. Cluster/s must be available and ready.
5. CAPIProvider/s should be available and migration script can be run for providers chart to take ownership of the resources.
6. Apply provider chart.
7. All CAPI resources should be unaffected.

The following document is a guide on how to execute this migration: https://github.com/rancher/turtles-docs/blob/520d69d2e04d5f7197d548caae7a8688c349f356/docs/next/modules/en/pages/tutorials/migration.adoc

[furkatgofurov7]

@salasberryfin I think this can be closed also as completed and covered by #1881 ?

[salasberryfin]

Yes, @furkatgofurov7. Let's close it as chart-upgrade already tests that CAPIProvider and Clusters are available after upgrade.