fix(consume): better xdist detection for consume

[danceratopz]

WIP: This did fix client not being correctly cleaned up, but solution looks like overkill. Will self-review first

EngineX relies on each pre-alloc group being executed by a single xdist worker so that the per-worker client manager sees every test in the group and can stop the shared client as soon as the group completes.

The previous parallelism detection only matched '-n' as a separate argument. Common spellings such as '-n=6', '-n6', and '--numprocesses=6' did not trigger the EngineX loadgroup override, so pytest-xdist could use its default distribution and split one pre-alloc group across workers.

Detect all supported xdist parallelism spellings and ensure consume enginex always runs with '--dist=loadgroup', overriding incompatible distribution modes with a warning. Keep the behavior scoped to EngineX so consume engine and the other simulators are unchanged.

🗒️ Description

🔗 Related Issues or PRs

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✅ Checklist

• All: Ran fast static checks to avoid unnecessary CI fails, see also Code Standards and Enabling Pre-commit Checks:

  just static

• All: PR title adheres to the repo standard - it will be used as the squash commit message and should start type(scope):.
• All: Considered updating the online docs in the ./docs/ directory.
• All: Set appropriate labels for the changes (only maintainers can apply labels).

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.17%. Comparing base (9d18733) to head (da36290).

Additional details and impacted files

@@               Coverage Diff                @@
##           forks/amsterdam    #2793   +/-   ##
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  Coverage            88.17%   88.17%           
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  Files                  577      577           
  Lines                35659    35659           
  Branches              3490     3490           
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  Hits                 31442    31442           
  Misses                3654     3654           
  Partials               563      563           

Flag	Coverage Δ
unittests	88.17% <ø> (ø)

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