♻️[RUMF-1517] split rum test utils

[bcaudan]

Motivation

Avoid single utils files

Changes

• From rum/test/utils:
  • extract mockWorker
  • extract mutationPayloadValidator
  • extract segments.specHelper
  • extract nodes.specHelper
  • extract observers.specHelper
  • move parseSegment to segment.spec.ts
• rename utils in recordsPerFullSnapshot

Testing

• Local
• Staging
• Unit
• End to end

---

I have gone over the contributing documentation.

[bcaudan]

Current dependencies on/for this PR:

• main
  • PR ♻️[RUMF-1517] add test index files #2115
    • PR ♻️[RUMF-1517] split rum test utils #2117 👈
    • PR ♻️[RUMF-1517] split core specHelper #2111

This comment was auto-generated by Graphite.

[codecov-commenter]

Codecov Report

Merging #2117 (882ec36) into main (0b18707) will decrease coverage by 0.06%.
The diff coverage is 83.13%.

@@            Coverage Diff             @@
##             main    #2117      +/-   ##
==========================================
- Coverage   93.73%   93.67%   -0.06%     
==========================================
  Files         164      168       +4     
  Lines        5694     5690       -4     
  Branches     1303     1303              
==========================================
- Hits         5337     5330       -7     
- Misses        357      360       +3     

Impacted Files	Coverage Δ
packages/rum/test/segments.ts	11.76% <11.76%> (ø)
packages/rum/test/mutationPayloadValidator.ts	82.75% <82.75%> (ø)
packages/rum/test/nodes.ts	87.50% <87.50%> (ø)
packages/rum/test/mockWorker.ts	100.00% <100.00%> (ø)
packages/rum/test/recordsPerFullSnapshot.ts	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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