feat: heap profiler

[svetlanabrennan]

Added heap profiler for testing on this branch

[bizob2828]

since this is just to merge our samplers together and nothing else. this is fine. i verified they are both collecting data

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.74%. Comparing base (7f25fc0) to head (5091220).
⚠️ Report is 1 commits behind head on profilers-wip.

Files with missing lines	Patch %	Lines
lib/profiling/index.js	40.00%	3 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##           profilers-wip    #3751      +/-   ##
=================================================
- Coverage          97.74%   97.74%   -0.01%     
=================================================
  Files                454      454              
  Lines              58709    58714       +5     
  Branches               1        1              
=================================================
+ Hits               57387    57389       +2     
- Misses              1322     1325       +3     

Flag	Coverage Δ
integration-tests-cjs-20.x	74.23% <16.66%> (+<0.01%)	⬆️
integration-tests-cjs-22.x	74.26% <16.66%> (+<0.01%)	⬆️
integration-tests-cjs-24.x	75.07% <16.66%> (-0.01%)	⬇️
integration-tests-esm-20.x	52.99% <16.66%> (-0.01%)	⬇️
integration-tests-esm-22.x	53.04% <16.66%> (-0.01%)	⬇️
integration-tests-esm-24.x	54.21% <16.66%> (-0.01%)	⬇️
unit-tests-20.x	89.47% <50.00%> (-0.01%)	⬇️
unit-tests-22.x	89.50% <50.00%> (-0.01%)	⬇️
unit-tests-24.x	89.50% <50.00%> (-0.01%)	⬇️
versioned-tests-20.x	81.31% <16.66%> (-0.01%)	⬇️
versioned-tests-22.x	81.32% <16.66%> (?)
versioned-tests-24.x	81.22% <16.66%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ 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.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.