Enhanced RPC tests for packs and components (#1383)

[grasci-arm]

• Test to pack reference count and origin, including clayer

• Add test to select and unselect missing component

[github-actions]

Test Results

    3 files     21 suites   14m 51s ⏱️
  437 tests   437 ✅ 0 💤 0 ❌
1 311 runs  1 311 ✅ 0 💤 0 ❌

Results for commit 00299fd.

[codecov]

Codecov Report

❌ Patch coverage is 58.82353% with 28 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.36%. Comparing base (de71cfc) to head (00299fd).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
tools/projmgr/test/src/ProjMgrRpcTests.cpp	58.20%	0 Missing and 28 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2320      +/-   ##
==========================================
- Coverage   66.36%   66.36%   -0.01%     
==========================================
  Files         181      181              
  Lines       36670    36737      +67     
  Branches    22803    22867      +64     
==========================================
+ Hits        24336    24380      +44     
+ Misses       7631     7627       -4     
- Partials     4703     4730      +27     

Flag	Coverage Δ
projmgr-cov	80.22% <58.82%> (-0.07%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
tools/projmgr/src/ProjMgrRpcServer.cpp	82.74% <100.00%> (+0.18%)	⬆️
tools/projmgr/test/src/ProjMgrRpcTests.cpp	53.34% <58.20%> (+0.44%)	⬆️

... and 2 files with indirect coverage changes

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