✨ [RUMF-994] Support intake v2

[amortemousque]

Motivation

Intake v2 API gives us more flexibility to structure Intake and network proxies, hence makes the ingest pipeline easier to operate and more reliable.

In order to be up to date, the RUM browser SDK is planning to support Intake v2.

Changes

• Add a new configuration option intakeApiVersion?: 1 | 2
• Implement intake v2 endpoint
• Move configuration logic in configuration folder

Testing

Local, Unit

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I have gone over the contributing documentation.

[codecov-commenter]

Codecov Report

Merging #1013 (1a25d2e) into main (1477bbe) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1013      +/-   ##
==========================================
+ Coverage   89.02%   89.10%   +0.07%     
==========================================
  Files          86       87       +1     
  Lines        4119     4129      +10     
  Branches      946      947       +1     
==========================================
+ Hits         3667     3679      +12     
+ Misses        452      450       -2     

Impacted Files	Coverage Δ
packages/core/src/domain/configuration.ts	90.00% <100.00%> (+3.33%)	⬆️
packages/core/src/domain/endpointBuilder.ts	100.00% <100.00%> (ø)
packages/core/src/domain/transportConfiguration.ts	100.00% <100.00%> (ø)
packages/core/src/tools/timeUtils.ts	93.93% <0.00%> (+3.03%)	⬆️

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