⚗️ [RUMF-1499] Don't send duration for resources crossing a page frozen state

[amortemousque]

Motivation

The resource duration for XHR and fetch is computed by the SDK if the corresponding resource timing isn’t found. If during the resource a page frozen state happens, we will wrongfully compute the duration:

In these cases the browser SDK will now send resources without duration.

Changes

Check if the request crossed a frozen state in resourceCollection.ts

Testing

• Local
• Staging
• Unit
• End to end

---

I have gone over the contributing documentation.

[codecov-commenter]

Codecov Report

Merging #2255 (0e82f5f) into main (6ac666e) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2255      +/-   ##
==========================================
+ Coverage   94.02%   94.08%   +0.05%     
==========================================
  Files         201      201              
  Lines        6095     6103       +8     
  Branches     1349     1353       +4     
==========================================
+ Hits         5731     5742      +11     
+ Misses        364      361       -3     

Impacted Files	Coverage Δ
packages/core/src/tools/experimentalFeatures.ts	100.00% <100.00%> (ø)
...rumEventsCollection/resource/resourceCollection.ts	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

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[bcaudan]

it should probably be a ⚗️ instead of 🐛