[Other] Adapt C&H test cluster to Requirements for testing cluster-stacks (scs-0216)

[anjastrunk]

Adapt C&H test cluster to Requirements for testing cluster-stacks (scs-0216) and evaluate its costs.

Todos:

• Adapt C&H test cluster to SCS standard
• Update standard documentation with costs/cost estimation
• Write how to and/or adaption script

[cah-hbaum]

Wont be done since it is a) a decision record and b) not possible with our K8s setup based on yaook/k8s.