Add ToOtlpLog unit tests for scopes

[mfogliatto]

Towards #2873

Changes

Add ToOtlpLog unit tests for scopes

Merge requirement checklist

• CONTRIBUTING guidelines followed (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)

[codecov]

Codecov Report

Merging #4523 (c4158e0) into main (64df5e3) will increase coverage by 0.06%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4523      +/-   ##
==========================================
+ Coverage   85.14%   85.20%   +0.06%     
==========================================
  Files         318      318              
  Lines       12620    12620              
==========================================
+ Hits        10745    10753       +8     
+ Misses       1875     1867       -8     

see 7 files with indirect coverage changes

[cijothomas]

could you add the case where scope is something other than List ? like a simple string, for example, or some other ds like dictionary, etc.

[cijothomas]

LGTM.
Not a blocker, but we need to add tests when scope is something other than List as well.
Also worth adding is the case where the keys are duplicated in multiple scope levels and in the logger.log itself.