feat: smoke tests for capms dell_sonic flavor

[ma-hartma]

Description

I want to run smoke tests for the capms flavor on Dell SONiC.

References (please merge them first)

• fix: calico-lab template support for cluster-api v1.11 #141
• fix: re-introduce bgp restart for community sonic to ensure default route mini-lab#302

Closes #138
Closes #132

[ma-hartma]

So the new tests run successfully on my developer notebook, with all 3 machines coming up and the cluster becoming ready.
But: container pulls are extremely slow and the cluster takes quite some time to get into a ready state.
In the GH actions on ubuntu-latest, the third node (worker) does never come up. Any ideas?

[Gerrit91]

The repo was not whitelisted for self-hosted runners.

[ma-hartma]

So all nodes come up and the metal-ccm and calico get deployed. See this pipeline run: https://github.com/metal-stack/cluster-api-provider-metal-stack/actions/runs/26278616589/job/77349910193?pr=137

Unfortunately, we get the same problem as @vknabel and me on our developer machines: it takes forever for containers to come up and the nodes don't get ready until metal-ccm and calico are.

Despite that this test is better than no test, if we just stop after 3 machines phoned home successfully.
But waiting for them to get ready would be much better.

[ma-hartma]

@Sven-Ric is trying to take a look (thanks), as the team's opinion was that the tests would be quite valuable.
The tests in general seem to be fine, but it is the virtual dell_sonic environment that needs fixing.