♻️ [RUMF-1181] preliminary refactorings for telemetry events collection

[bcaudan]

Motivation

Various refactoring mentioned in #1351 to ease the future collection of telemetry events

Changes

• Move RUM batch creation earlier: in order to start collecting telemetry events as soon as possible
• Mutualize monitoring batch and logger batch: easily reuse a simple batch with replica structure
• Move RUM and Logs internal monitoring at same level: increase consistency between RUM and logs
• Move internal monitoring transport to RUM and logs: telemetry transport strategy will vary depending on the package, so let the caller handle it

Testing

• Local
• Staging
• Unit
• End to end

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I have gone over the contributing documentation.

[BenoitZugmeyer]

❓ question: ‏This piece of code is now duplicated in both Logs and RUM. The goal is to be able to modify the RUM version to integrate it with LifeCycle in the follow-up PR, right?

[bcaudan]

exactly, it the exact same thing for now but it will diverge to handle telemetry events

[codecov-commenter]

Codecov Report

Merging #1371 (f36f457) into main (6fb165b) will decrease coverage by 0.99%.
The diff coverage is 53.06%.

@@            Coverage Diff             @@
##             main    #1371      +/-   ##
==========================================
- Coverage   90.95%   89.95%   -1.00%     
==========================================
  Files         103      102       -1     
  Lines        4188     4182       -6     
  Branches      934      934              
==========================================
- Hits         3809     3762      -47     
- Misses        379      420      +41     

Impacted Files	Coverage Δ
packages/rum-core/src/boot/startRum.ts	22.50% <0.00%> (-19.44%)	⬇️
packages/rum-core/src/transport/startRumBatch.ts	0.00% <ø> (-76.48%)	⬇️
packages/logs/src/boot/startLogs.ts	87.09% <73.33%> (-3.29%)	⬇️
...ckages/core/src/transport/startBatchWithReplica.ts	81.81% <81.81%> (ø)
...rc/domain/internalMonitoring/internalMonitoring.ts	98.30% <100.00%> (-0.11%)	⬇️
packages/rum-core/src/boot/rumPublicApi.ts	94.73% <100.00%> (-0.06%)	⬇️
...ages/rum-core/src/transport/startRumEventBridge.ts	0.00% <0.00%> (-100.00%)	⬇️
packages/core/src/transport/httpRequest.ts	76.66% <0.00%> (-20.00%)	⬇️

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