feat(objectstore): Add proxying logic to endpoint

[lcian]

This implements get/post/put/delete endpoints that simply proxy requests to the internal Objectstore service, as we don't want to expose it directly to the internet for now.

The endpoints stream the request bodies directly to Objectstore.

All endpoints are gated by the organizations:objectstore-endpoint feature flag which will be enabled only for sentry initially.

[github-actions]

🚨 Warning: This pull request contains Frontend and Backend changes!

It's discouraged to make changes to Sentry's Frontend and Backend in a single pull request. The Frontend and Backend are not atomically deployed. If the changes are interdependent of each other, they must be separated into two pull requests and be made forward or backwards compatible, such that the Backend or Frontend can be safely deployed independently.

Have questions? Please ask in the #discuss-dev-infra channel.

[lcian]

@sentry review

[codecov]

Codecov Report

❌ Patch coverage is 79.66102% with 24 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/sentry/objectstore/endpoints/organization.py	79.66%	24 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #104045      +/-   ##
===========================================
+ Coverage   80.59%    80.62%   +0.02%     
===========================================
  Files        9333      9333              
  Lines      398600    398900     +300     
  Branches    25497     25497              
===========================================
+ Hits       321271    321632     +361     
+ Misses      76879     76818      -61     
  Partials      450       450              

[lcian]

bugbot run