Add V8 .heapprofile importer

[krsh732]

Based on #4463

The first commit should display the same data as Chrome/Edge DevTools and VS Code do for .heapprofiles.
V8 Heap profiles have a samples field containing allocation samples. However, as far as I am aware, none of the existing tools actually use that field (properly). Chrome/Edge have an experimental feature to use samples. While this works when recording the heapprofile, the experimental feature breaks importing profiles and end up displaying nothing at all (even the call tree stops working).

In the 2nd commit I tried to use samples, but I'd like reviewers opinion on it and how to proceed:

• Would it be too misleading to use this field? While it allows you to filter allocations in the timeline, it technically isn't time at all... The heapprofiles only save the ordinal, not the timestamps used in Chrome's TimelineOverview when recording.
• There are differences between the sizes reported in the profile tree vs samples (see root total on deploy preview links for example).
• To combat the differences, should we have an extra track, or does that make things far too confusing? One which uses only the self sizes from the tree, and the other from the sample?

Additional questions for reviewers:

1. Are the categories OK?
2. Should I be using the resourceTable similar to the chrome importer instead of pushing -1 like dhat?
3. Is there any other information that I could/should be populating in the profile for the importer?

Things left to do:

• Add tests
• Touch Home--load-files-from-other-tools in app.ftl?

Fixes #4461

Deploy previews with samples: Chrome profile | Node profile
Deploy previews without samples: Chrome profile | Node profile
Original .heapprofiles used for previews: heapprofiles.zip

┆Issue is synchronized with this Jira Task

[codecov]

Codecov Report

Patch coverage: 27.85% and project coverage change: -0.34 ⚠️

Comparison is base (16e5c34) 88.63% compared to head (a85e9c0) 88.29%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4467      +/-   ##
==========================================
- Coverage   88.63%   88.29%   -0.34%     
==========================================
  Files         293      294       +1     
  Lines       25981    26101     +120     
  Branches     6996     7025      +29     
==========================================
+ Hits        23027    23047      +20     
- Misses       2748     2836      +88     
- Partials      206      218      +12     

Impacted Files	Coverage Δ
src/profile-logic/import/v8-heap-profile.js	10.09% <10.09%> (ø)
src/components/shared/StackSettings.js	92.50% <66.66%> (-2.24%)	⬇️
src/profile-logic/process-profile.js	90.96% <66.66%> (-0.12%)	⬇️
src/profile-logic/profile-data.js	93.67% <93.75%> (+<0.01%)	⬆️
src/selectors/per-thread/composed.js	100.00% <100.00%> (+3.12%)	⬆️
src/selectors/per-thread/thread.js	94.73% <100.00%> (+0.03%)	⬆️

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[julienw]

Hey! Just a quick note that we've seen your PR but just didn't have the chance to look at it during this week. It's still on our radar, thanks for your patience!