Skip removal of offerings if in use during domain removal

[sudo87]

Description

This PR fixes #11502
Removal of offerings is skipped if it is in use by any Instance.

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• Build/CI
• Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 4.00%. Comparing base (c631d6a) to head (fcbfe26).
⚠️ Report is 3 commits behind head on 4.20.

❗ There is a different number of reports uploaded between BASE (c631d6a) and HEAD (fcbfe26). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (c631d6a)	HEAD (fcbfe26)
unittests	1	0

Additional details and impacted files

@@              Coverage Diff              @@
##               4.20   #11780       +/-   ##
=============================================
- Coverage     16.17%    4.00%   -12.17%     
=============================================
  Files          5656      402     -5254     
  Lines        498242    32661   -465581     
  Branches      60458     5807    -54651     
=============================================
- Hits          80584     1309    -79275     
+ Misses       408686    31199   -377487     
+ Partials       8972      153     -8819     

Flag	Coverage Δ
uitests	4.00% <ø> (ø)
unittests	?

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[shwstppr]

@sudo87 idea seems correct, implementation not

[sudo87]

@blueorangutan package

[blueorangutan]

@sudo87 a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 15304