Deprecate and remove the ETOS suite starter

[t-persson]

Description

With the creation of the ETOS controller we should deprecated and eventually remove the suite starter.
This should only happen when we get the ETOS controller specification version to v1 and we completely stop supporting "etos v0".

Once the suite starter has been removed we should update a few places in the ETOS controller. Please see the links below.

Additional Context

No response

Further links

https://github.com/eiffel-community/etos/blob/main/api/v1alpha1/cluster_types.go#L103-L105
https://github.com/eiffel-community/etos/blob/main/api/v1alpha1/cluster_types.go#L114-L133
https://github.com/eiffel-community/etos/blob/main/api/v1alpha1/cluster_types.go#L135-L151

https://github.com/eiffel-community/etos/tree/main/internal/etos/suitestarter