Bytes based batching for traces

[iblancasa]

Description

This PR implements serialized bytes based batching for traces.

Link to tracking issue

#3262

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

[bogdandrutu]

My biggest concern about this is the required changes to pdata. I am trying to see if there is any other way to avoid that.

[codecov]

Codecov Report

Attention: Patch coverage is 95.08197% with 6 lines in your changes missing coverage. Please review.

Project coverage is 92.17%. Comparing base (b741c48) to head (a0b8572).
Report is 24 commits behind head on main.

Files with missing lines	Patch %	Lines
pdata/ptrace/pb.go	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12519      +/-   ##
==========================================
+ Coverage   92.16%   92.17%   +0.01%     
==========================================
  Files         471      472       +1     
  Lines       25561    25635      +74     
==========================================
+ Hits        23558    23629      +71     
- Misses       1591     1595       +4     
+ Partials      412      411       -1     

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[iblancasa]

My biggest concern about this is the required changes to pdata. I am trying to see if there is any other way to avoid that.

Ok. Please let me know if I can help with this somehow. I will very likely start working on the PRs for the other signals as well and adapt whatever is needed if there is a change.

[bogdandrutu]

Needs rebase after #12550 is merged, and please make sure all fixes are also applied to this PR.

[iblancasa]

@bogdandrutu can you take a look? I think we are ready to go