Upgrade Slurm to version 23.02.6

[jdeamicis]

Description of changes

• Upgrade Slurm to version 23.02.6

References

• Upgrade Slurm to version 23.02.6 aws-parallelcluster#5754

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.

Please review the guidelines for contributing and Pull Request Instructions.

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

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (c4817df) 70.34% compared to head (b4905b6) 70.34%.

Additional details and impacted files

@@             Coverage Diff              @@
##           release-3.7    #2495   +/-   ##
============================================
  Coverage        70.34%   70.34%           
============================================
  Files               13       13           
  Lines             1851     1851           
============================================
  Hits              1302     1302           
  Misses             549      549           

Flag	Coverage Δ
unittests	70.34% <ø> (ø)

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