Bytes based batching for profiles

[iblancasa]

Description

This PR implements serialized bytes based batching for metrics.

Link to tracking issue

#3262

Continuation of #12299 made by @sfc-gh-sili.

Related PRs:

• Bytes based batching for metrics #12550
• Bytes based batching for traces #12519

[codecov]

Codecov Report

Attention: Patch coverage is 73.88060% with 35 lines in your changes missing coverage. Please review.

Project coverage is 92.06%. Comparing base (e43c36c) to head (84d2ecc).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...er/exporterhelper/internal/sizer/profiles_sizer.go	0.00%	16 Missing ⚠️
...r/exporterhelper/xexporterhelper/profiles_batch.go	86.59%	11 Missing and 2 partials ⚠️
pdata/pprofile/pb.go	40.00%	6 Missing ⚠️

❌ Your patch check has failed because the patch coverage (73.88%) 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   #12564      +/-   ##
==========================================
- Coverage   92.21%   92.06%   -0.15%     
==========================================
  Files         469      470       +1     
  Lines       25368    25468     +100     
==========================================
+ Hits        23392    23447      +55     
- Misses       1568     1609      +41     
- Partials      408      412       +4     

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