[release-3.7] Reduce wait-time while checking mpi jobs

[NSsirena]

Description of changes

While testing slurm we also test mpi job submission. The wait time to check the mpi job started was of
comparable size with the time requested to complete the job itself. This lead to flacky results.
By reducing this wait time the chances of failures should be greatly reduced.

• wait-time to check that mpi-job is running reduced from 30s to 10s

Tests

• Manually launched the test with Login Nodes and Ubuntu2204

References

N/A

Checklist

• Make sure you are pointing to the right branch.
• If you're creating a patch for a branch other than develop add the branch name as prefix in the PR title (e.g. [release-3.6]).
• Check all commits' messages are clear, describing what and why vs how.
• Make sure to have added unit tests or integration tests to cover the new/modified code.
• Check if documentation is impacted by this change.

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #5654 (7ba7c28) into release-3.7 (6490d2b) will not change coverage.
Report is 1 commits behind head on release-3.7.
The diff coverage is n/a.

❗ Current head 7ba7c28 differs from pull request most recent head 005336c. Consider uploading reports for the commit 005336c to get more accurate results

@@             Coverage Diff              @@
##           release-3.7    #5654   +/-   ##
============================================
  Coverage        89.89%   89.89%           
============================================
  Files              179      179           
  Lines            15366    15366           
============================================
  Hits             13813    13813           
  Misses            1553     1553           

Flag	Coverage Δ
unittests	89.89% <ø> (ø)

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