Add ToOtlpLog unit tests for scopes (cont.)

[mfogliatto]

Fixes #2873

Changes

• Add tests for multiple scope types
• Add tests for duplicated keys scenarios

Merge requirement checklist

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

[codecov]

Codecov Report

Merging #4578 (3df1a8b) into main (b7821f7) will increase coverage by 0.07%.
The diff coverage is n/a.

❗ Current head 3df1a8b differs from pull request most recent head 3824af8. Consider uploading reports for the commit 3824af8 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4578      +/-   ##
==========================================
+ Coverage   85.08%   85.15%   +0.07%     
==========================================
  Files         312      320       +8     
  Lines       12532    12733     +201     
==========================================
+ Hits        10663    10843     +180     
- Misses       1869     1890      +21     

see 17 files with indirect coverage changes

[utpilla]

Left some minor comments which are not blocking this PR.

Thanks @mfogliatto for adding these tests!