Update -Cprocessors on scale compute

[WalBeh]

Summary of changes

Improve Resource Requests and Limits Handling for start_cluster function. And also change the jvm -CProcessor setting which should reliably report the number of CPUs available in a docker environment.

• Updated start_cluster Function:

  • Modified to accept both resource_requests and resource_limits as separate parameters.
  • Ensured proper handling and application of these resources when initializing clusters.

• Refactored utils.py:

  • Corrected conditional checks to accurately apply resource limits and requests.
  • Enhanced error handling for missing resource specifications.

• Enhanced Test Cases in test_change_compute.py:

  • Fixed asynchronous calls by properly awaiting the start_cluster coroutine, as the test now needs to pull in the crate container commands from the Statefulset.
  • Updated tests to verify that CPU and memory limits, requests and -Cprocessors are set correctly on scale compute.
  • Added assertions to ensure that resource configurations are applied as intended.

Thanks a lot to @Taliik for the help with the changes in the tests.

Checklist

• Link to issue this PR refers to: https://github.com/crate/cloud/issues/2277
• Relevant changes are reflected in CHANGES.rst
• Added or changed code is covered by tests
• Documentation has been updated if necessary
• Changed code does not contain any breaking changes (or this is a major version change)

[tomach]

💯 LGTM! just one minor suggestion, if you feel like it. and pls add a short note to CHANGES.rst