Fixing bridge API bug

[juliuskoval]

Fixes #
Design discussion issues #4433, #6109

Changes

This would change the behavior of the logging bridge API where body of the exported log would be set by the Body of the emitted LogRecordData. I'm not sure if this change would be OK with you, but I don't see another way of directly setting both the body and the {OriginalFormat} attribute. This workaround is possible, but obviously not ideal. This scenario wasn't covered by unit tests, so I added one.

Merge requirement checklist

• CONTRIBUTING guidelines followed (license requirements, nullable enabled, static analysis, etc.)
• Unit tests added/updated
• Appropriate CHANGELOG.md files updated for non-trivial changes
• Changes in public API reviewed (if applicable)

[CodeBlanch]

I think we need to agree on a direction via the issue before trying to fix something.

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.38%. Comparing base (89ea5c6) to head (96eeaba).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6113      +/-   ##
==========================================
- Coverage   86.39%   86.38%   -0.01%     
==========================================
  Files         257      257              
  Lines       11640    11635       -5     
==========================================
- Hits        10056    10051       -5     
  Misses       1584     1584              

Files with missing lines	Coverage Δ
...ementation/Serializer/ProtobufOtlpLogSerializer.cs	98.43% <ø> (-0.06%)	⬇️
src/OpenTelemetry/Logs/LoggerSdk.cs	100.00% <ø> (ø)