[processorhelper] add processorhelperprofiles package

[haoqixu]

Description

Add processorhelperprofiles to support profiles signal.

cc @mx-psi @dmathieu

[codecov]

Codecov Report

Attention: Patch coverage is 93.33333% with 3 lines in your changes missing coverage. Please review.

Project coverage is 91.46%. Comparing base (90243f3) to head (2d168fc).
Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
...rocessorhelper/processorhelperprofiles/profiles.go	85.71%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11556      +/-   ##
==========================================
- Coverage   91.47%   91.46%   -0.02%     
==========================================
  Files         435      440       +5     
  Lines       23757    23887     +130     
==========================================
+ Hits        21732    21848     +116     
- Misses       1648     1660      +12     
- Partials      377      379       +2     

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[dmathieu]

This PR introduces a new module. I think it should include a changelog entry (and not be a chore).

[mx-psi]

@haoqixu To be able to use this package in contrib, you need to run make update-otel to update to the latest commit (002a748). The process can be a bit fragile and need manual steps, feel free to reach out on #otel-collector-dev on the CNCF Slack for help!