infra: preview branches use self hosting

[AyushAgrawal-A2]

closes #2075

https://pr-2140.quadratic-selfhost.com/

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Name	Status	Preview	Updated (UTC)
quadratic	✅ Ready (Inspect)	Visit Preview	Dec 31, 2024 0:38am

[codecov]

Codecov Report

Attention: Patch coverage is 40.74074% with 16 lines in your changes missing coverage. Please review.

Project coverage is 90.97%. Comparing base (0a56bef) to head (810435c).
Report is 46 commits behind head on qa.

Files with missing lines	Patch %	Lines
quadratic-connection/src/config.rs	42.85%	8 Missing ⚠️
quadratic-multiplayer/src/config.rs	38.46%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##               qa    #2140      +/-   ##
==========================================
+ Coverage   88.92%   90.97%   +2.05%     
==========================================
  Files         305      295      -10     
  Lines       62028    62344     +316     
==========================================
+ Hits        55157    56717    +1560     
+ Misses       6871     5627    -1244     

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