Remove PRODUCTION_TOKEN from all tests

[Wauplin]

In our CI tests we use a production token in two cases:

1. for Spaces tests => those are flaky and always brake one way or the other (recently because of quotas). This is quite annoying and not very useful as we are more testing the Space infra rather than the huggingface_hub API). This PR updates these tests to use VCR tests instead (requests are replayed without hitting the Hub).
2. for a gated repo test => this can be done programmatically on staging => updated in this PR

After this PR, we should be able to remove the HUGGINGFACE_PRODUCTION_USER_TOKEN token from Github secrets.

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e063d80) 82.39% compared to head (6a99518) 82.42%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1937      +/-   ##
==========================================
+ Coverage   82.39%   82.42%   +0.03%     
==========================================
  Files          66       66              
  Lines        8132     8132              
==========================================
+ Hits         6700     6703       +3     
+ Misses       1432     1429       -3     

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[LysandreJik]

Looks good to me! Awesome that staging got unlocked for gated repos, will need to update this on transformers' side as well

Cool cassettes!

[Wauplin]

Thanks for the review!