Refactor ccm test scripts

[eperott]

We keep a few test scripts which are using ccm to setup test clusters for demo and "performance test" purposes. There are a lot of repeated code in those scripts. Consider to extract common parts to a helper script to make the whole thing more maintainable.

[0rlych1kk4]

Hi, I’d like to work on this issue.
From the description, it seems that several CCM test scripts share duplicated logic. My plan is to extract the common setup and helper functionality into a reusable script to improve maintainability and reduce duplication.
Before starting, could you please confirm:

1. Whether this issue is still open for contribution?
2. If there are any preferred conventions or structure for the helper script?

Thanks!