SLE Micro images for supported CAPI providers

[alexander-demicev]

To support CAPRKE2 with CAPA (or any other infrastructure provider) we need to find a way to build and distribute SLE Micro images that have all RKE2 components and dependencies baked-in. This means that there will be a separate CAPI image for every RKE2 version. The reason behind this is that CAPI treats machines as immutable and upgrades require a rollout of new machines.

What exactly has to be present on the system:

• RKE2 airgapped tarballs for a specific release.
• Installed and configured dependencies like running ssh.
• Infrastructure specific dependencies, for example, Amazon SSM agent.

Related issues:

• Create vSphere RKE2 Image #48
• Support CAPA/CAPZ/CAPG-ready SLE Micro images elemental-toolkit#1978