Stop using sampleCallNodes in ThreadSampleGraph.

[mstange]

We just need to know whether a sample was filtered out, so we can check the sample's stack for that.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (efbe020) 88.27% compared to head (8f3eb30) 88.27%.
Report is 2 commits behind head on main.

❗ Current head 8f3eb30 differs from pull request most recent head 5fc4a4b. Consider uploading reports for the commit 5fc4a4b to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4809      +/-   ##
==========================================
- Coverage   88.27%   88.27%   -0.01%     
==========================================
  Files         301      301              
  Lines       26911    26910       -1     
  Branches     7284     7284              
==========================================
- Hits        23755    23754       -1     
  Misses       2938     2938              
  Partials      218      218              

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[julienw]

thanks, sounds good to me