ref(replay): Refactor ReplayReader to provide eventsWithSnapshots and touchEvents lists for video replays

[ryan953]

I wanted to move the loop that creates eventsWithSnapshots into ReplayReader, and also the filter that outputs the touchEvents array. The reader does a lot of stuff like this already, and memoizes the results consistently, so I think it should all go together in there.

Also this helps to slim down class VideoReplayerWithInteractions which i want to do, so it can have a simpler & similar interface to class Replayer

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 3 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
static/app/utils/replays/replayReader.tsx	80.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #80879      +/-   ##
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+ Coverage   74.97%   78.41%   +3.43%     
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  Files        7207     7206       -1     
  Lines      319509   319465      -44     
  Branches    44001    43986      -15     
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+ Hits       239559   250515   +10956     
+ Misses      73432    62573   -10859     
+ Partials     6518     6377     -141