✨[RUMF-1481] Remove product subdomain for ap1 intake requests

[bcaudan]

Motivation

Avoid to setup specific subdomain for each product.

Changes

Remove product subdomain for ap1 intake requests.

Testing

• Local
• Staging
• Unit
• End to end

---

I have gone over the contributing documentation.

[codecov-commenter]

Codecov Report

Merging #1997 (cec03de) into main (a4d336c) will increase coverage by 0.09%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1997      +/-   ##
==========================================
+ Coverage   93.50%   93.60%   +0.09%     
==========================================
  Files         145      145              
  Lines        5515     5517       +2     
  Branches     1258     1259       +1     
==========================================
+ Hits         5157     5164       +7     
+ Misses        358      353       -5     

Impacted Files	Coverage Δ
...s/core/src/domain/configuration/endpointBuilder.ts	100.00% <100.00%> (ø)
...kages/core/src/domain/configuration/intakeSites.ts	100.00% <100.00%> (ø)
...rum-core/src/domain/contexts/foregroundContexts.ts	98.46% <0.00%> (+7.69%)	⬆️

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