feat: Add experimentalExactManifestTimings which forgoes TIME_FUDGE_FACTOR during segment choice

[brandonocasey]

Remove TIME_FUDGE_FACTOR from our calculations and just use manifest values.

[codecov]

Codecov Report

Merging #1165 (b26ddd3) into main (a0c0359) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1165      +/-   ##
==========================================
+ Coverage   86.49%   86.50%   +0.01%     
==========================================
  Files          39       39              
  Lines        9590     9599       +9     
  Branches     2214     2218       +4     
==========================================
+ Hits         8295     8304       +9     
  Misses       1295     1295              

Impacted Files	Coverage Δ
src/master-playlist-controller.js	94.60% <ø> (ø)
src/videojs-http-streaming.js	90.30% <ø> (ø)
src/playlist.js	94.32% <100.00%> (+0.20%)	⬆️
src/segment-loader.js	96.22% <100.00%> (+<0.01%)	⬆️

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