Use more bitsets where possible

[canova]

Fixes #5931.

All the commits should be self contained and should be changing one thing so it's easier to review.

All the tests pass and I can't see any issues, but I will do some more testing before I ask for a review.

[codecov]

Codecov Report

❌ Patch coverage is 96.42857% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 85.42%. Comparing base (b8aabaa) to head (35d88d0).
⚠️ Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
src/profile-logic/symbolication.ts	66.66%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5932   +/-   ##
=======================================
  Coverage   85.41%   85.42%           
=======================================
  Files         321      321           
  Lines       32158    32162    +4     
  Branches     8876     8875    -1     
=======================================
+ Hits        27469    27473    +4     
  Misses       4253     4253           
  Partials      436      436           

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