Add utility method on ManifestDescriptor to construct manifest descriptor with Platform and Annotation from Manifest

[jonesbusy]

Description

Add utility method on ManifestDescriptor to construct manifest descriptor with Platform and Annotation from Manifest

• Add test that assemble OpenTofu provider using this utils

Testing done

Added tests

Still need to test with real OCI registry if pull works

Submitter checklist

• I have read and understood the CONTRIBUTING guide
• I have run mvn license:update-file-header, mvn spotless:apply, pre-commit run -a, mvn clean install before opening the PR

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.29%. Comparing base (e56e3ed) to head (33ae6ac).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #591      +/-   ##
============================================
+ Coverage     88.19%   89.29%   +1.10%     
- Complexity      818      823       +5     
============================================
  Files            42       42              
  Lines          2431     2439       +8     
  Branches        299      299              
============================================
+ Hits           2144     2178      +34     
+ Misses          175      151      -24     
+ Partials        112      110       -2     

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