[core] plugins: Add rez plugin's package to the list of resolved packages

[cbentejac]

Description

This PR updates resolveRezSubrequires to append the current plugin's package (with its version) to the packages list when it matches the plugin's URI, ensuring it is included in the resolved dependencies.

It ensures that the plugin's nodes will be correctly recognized when processing the meshroom_compute operations.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.43%. Comparing base (0362aab) to head (b643c88).
⚠️ Report is 19 commits behind head on develop.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
meshroom/core/plugins.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2801      +/-   ##
===========================================
- Coverage    77.46%   77.43%   -0.03%     
===========================================
  Files           48       48              
  Lines         6735     6737       +2     
===========================================
  Hits          5217     5217              
- Misses        1518     1520       +2     

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