[develop] Move slurm_resume configuration in a sub-recipe

[NSsirena]

Description of changes

• Move slurm_resume configuration in a sub-recipe
• Creation of some directories required by the head node is moved into a dedicated subrecipe
• Add ScalingStrategy parameter to slurm_resume config
• Add a test to verify that slurm_resume related file and folders are properly created and configured

Tests

• Unit test passed on all OS (validated on EC2 instances)

References

• Same parameter added to the CLI
• And consumed by Node package

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

All modified lines are covered by tests ✅

Comparison is base (cf39542) 76.06% compared to head (4a7977d) 76.06%.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2483   +/-   ##
========================================
  Coverage    76.06%   76.06%           
========================================
  Files           13       13           
  Lines         1876     1876           
========================================
  Hits          1427     1427           
  Misses         449      449           

Flag	Coverage Δ
unittests	76.06% <ø> (ø)

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