⚗🐛 [RUMF-1296] use pointerup to trigger click actions

[BenoitZugmeyer]

This ticket is part of an effort to improve dead clicks.

• ⚗🐛 reset input state at the beginning of each click #1968 will fix an issue where a lot of dead clicks were completely ignored
• ⚗🐛 [RUMF-1296] use pointerup to trigger click actions  #1958 (this issue) will discard dead clicks when something happens during the 'pointerup' event (previously only things happening during the 'click' event were taken into account)
• ⚗🐛 [RUMF-1293] discard dead clicks when activity occurs on pointerdown #1979 will discard dead clicks when something happens during the 'pointerdown' event

All three fixes are behind the dead_click_fixes and will be released together after some dogfooding.

Motivation

We observed that in some cases, click actions are flagged as "dead click" when the UI updates during "pointerup" or "mouseup" events (happening before the "click" event).

Changes

This PR fixes the issue by starting a "click action" on pointerup instead of click events. This slightly changes the start of each action, but this change should be minimal when there is no pointerup or mouseup event listener.

This is behind a feature flag as I want to assess the impact on org2 before enabling it.

This PR also improve the multitouch situation.

Testing

• Local
• Staging
• Unit
• End to end

---

I have gone over the contributing documentation.

[codecov-commenter]

Codecov Report

Merging #1958 (3225f3d) into main (57d9e2a) will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1958      +/-   ##
==========================================
+ Coverage   93.34%   93.42%   +0.08%     
==========================================
  Files         144      144              
  Lines        5482     5488       +6     
  Branches     1246     1251       +5     
==========================================
+ Hits         5117     5127      +10     
+ Misses        365      361       -4     

Impacted Files	Coverage Δ
...ain/rumEventsCollection/action/actionCollection.ts	95.45% <ø> (ø)
...n/rumEventsCollection/action/listenActionEvents.ts	100.00% <100.00%> (ø)
...in/rumEventsCollection/action/trackClickActions.ts	98.26% <100.00%> (+0.03%)	⬆️
...rum-core/src/domain/contexts/foregroundContexts.ts	96.92% <0.00%> (+6.15%)	⬆️

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