⚗️[RUM-3234] Discard outdated vitals

[bcaudan]

Motivation

Avoid to report inflated vital values and to keep started vitals indefinitely in memory.

Changes

• ♻️ Extract pageHistory.wasInPageStateDuringPeriod
• ✨ discard a vital for which a frozen state happened
• ✨ discard pending vitals on SESSION_RENEWED

Testing

• Local
• Staging
• Unit
• End to end

---

I have gone over the contributing documentation.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 96.42857% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 92.87%. Comparing base (0c562b8) to head (6e587b9).

Files	Patch %	Lines
packages/rum-core/test/testSetupBuilder.ts	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2610   +/-   ##
=======================================
  Coverage   92.87%   92.87%           
=======================================
  Files         237      237           
  Lines        6887     6896    +9     
  Branches     1508     1507    -1     
=======================================
+ Hits         6396     6405    +9     
  Misses        491      491           

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[N-Boutaib]

LGTM