🔊 [RUMF-1041] add lcp info on view events

[BenoitZugmeyer]

Motivation

This is an iteration over #1108 . With this change, we'll be able to accurately filter view events without LCP based on their discard reason and support

Changes

• Remove a small leftover from ⚗ [RUMF-971] experiment to detect when the computer goes to sleep  #976
• Add LCP support and discard reason to initial view events based on the monitor-dropped-lcp flag

Testing

CI, manual

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I have gone over the contributing documentation.

[codecov-commenter]

Codecov Report

Merging #1129 (c526a1f) into main (c6cffa6) will increase coverage by 0.10%.
The diff coverage is 78.57%.

@@            Coverage Diff             @@
##             main    #1129      +/-   ##
==========================================
+ Coverage   89.03%   89.14%   +0.10%     
==========================================
  Files          93       93              
  Lines        4230     4236       +6     
  Branches      972      975       +3     
==========================================
+ Hits         3766     3776      +10     
+ Misses        464      460       -4     

Impacted Files	Coverage Δ
packages/rum-core/src/rawRumEvent.types.ts	100.00% <ø> (ø)
.../domain/rumEventsCollection/view/viewCollection.ts	93.75% <66.66%> (-6.25%)	⬇️
...umEventsCollection/view/trackInitialViewTimings.ts	95.94% <81.81%> (+7.21%)	⬆️

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