add delete partition pointcut

[jdar8]

• Add the STORAGE_PARTITION_DELETED pointcut
• Call pointcut upon deleting partition with the $partition-management-delete-partition operation

Closes #6313

[github-actions]

Formatting check succeeded!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.52%. Comparing base (406db33) to head (30b2e05).
Report is 62 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6314      +/-   ##
============================================
- Coverage     83.54%   83.52%   -0.03%     
- Complexity    27432    27625     +193     
============================================
  Files          1707     1720      +13     
  Lines        106185   106955     +770     
  Branches      13397    13454      +57     
============================================
+ Hits          88710    89331     +621     
- Misses        11750    11845      +95     
- Partials       5725     5779      +54     

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