♻️ [RUM-1039] Harmonize view tests

[amortemousque]

Motivation

Following the view metrics splitting, this PR reorganize the view tracking tests so that every spec files tests its related module.

Changes

• Cleanly stop INP tests
• Move CLS support check in trackCommonViewMetrics module
• Scope trackCumulativeLayoutShift tests
• Scope trackLoadingTime tests
• Scope trackViewEventCounts tests
• Reorganize trackViews tests

Testing

• Local
• Staging
• Unit
• End to end

---

I have gone over the contributing documentation.

[codecov-commenter]

Codecov Report

Merging #2430 (271831d) into main (5b6bb0b) will decrease coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2430      +/-   ##
==========================================
- Coverage   93.39%   93.33%   -0.07%     
==========================================
  Files         226      226              
  Lines        6644     6644              
  Branches     1479     1479              
==========================================
- Hits         6205     6201       -4     
- Misses        439      443       +4     

Files Changed	Coverage Δ
.../domain/view/viewMetrics/trackCommonViewMetrics.ts	95.45% <100.00%> (-0.55%)	⬇️
...ain/view/viewMetrics/trackCumulativeLayoutShift.ts	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

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