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 95.16129% with 6 lines in your changes missing coverage. Please review.

Project coverage is 92.19%. Comparing base (8cf42f3) to head (ac96a45).

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

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12519      +/-   ##
==========================================
+ Coverage   92.18%   92.19%   +0.01%     
==========================================
  Files         469      470       +1     
  Lines       25390    25466      +76     
==========================================
+ Hits        23405    23478      +73     
- Misses       1574     1578       +4     
+ Partials      411      410       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[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.