Introduce MergeFrom for profiles

[iblancasa]

trafficstars

Description

Link to tracking issue

This is part of https://github.com/open-telemetry/opentelemetry-collector/issues/13106 It introduces a new MergeFrom method, which allows merging to profiles.

Continuation fort #13588

[codecov[bot]]

Codecov Report

:x: Patch coverage is 65.86667% with 128 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 91.45%. Comparing base (5ec1466) to head (e2010f9). :warning: Report is 128 commits behind head on main.

Files with missing lines	Patch %	Lines
pdata/pprofile/merge.go	65.86%	87 Missing and 41 partials :warning:

:x: Your patch status has failed because the patch coverage (65.86%) is below the target coverage (95.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13928      +/-   ##
==========================================
- Coverage   91.67%   91.45%   -0.22%     
==========================================
  Files         652      653       +1     
  Lines       42516    42891     +375     
==========================================
+ Hits        38977    39228     +251     
- Misses       2731     2815      +84     
- Partials      808      848      +40     

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[github-actions[bot]]

This PR was marked stale due to lack of activity. It will be closed in 14 days.

[iblancasa]

We are working on this on other PRs.