Make GCS bucket location configurable

[janjagusch]

Closes #511

[janjagusch]

Linting error will disappear after #513 is merged.

[janjagusch]

I'm not entirely sure what to do about the failing unit tests:

authlib.integrations.base_client.errors.MismatchingStateError: mismatching_state: CSRF Warning! State not equal in request and response.
2022-04-05T16:45:36.8956085Z quetz/tests/authentification/test_oauth.py::test_config_create_user_with_role_in_different_provider[jupyter_response-user_roles0-None] FAILED [ 94%]

But this seems to affect multiple PRs and is probably not related to my changes.

Seems to be related to authlib: lepture/authlib#376

[janjagusch]

I'm not entirely sure what to do about the failing unit tests:

authlib.integrations.base_client.errors.MismatchingStateError: mismatching_state: CSRF Warning! State not equal in request and response.
2022-04-05T16:45:36.8956085Z quetz/tests/authentification/test_oauth.py::test_config_create_user_with_role_in_different_provider[jupyter_response-user_roles0-None] FAILED [ 94%]

But this seems to affect multiple PRs and is probably not related to my changes.

Seems to be related to authlib: lepture/authlib#376

Also fixed in #513

[wolfv]

Thanks, this looks good to me!

[wolfv]

I just rebased to see if tests are passing.

[codecov-commenter]

Codecov Report

Merging #512 (16d8507) into main (1ea9475) will decrease coverage by 0.91%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #512      +/-   ##
==========================================
- Coverage   83.21%   82.29%   -0.92%     
==========================================
  Files          78       78              
  Lines        5891     5892       +1     
==========================================
- Hits         4902     4849      -53     
- Misses        989     1043      +54     

Impacted Files	Coverage Δ
quetz/config.py	89.63% <ø> (ø)
quetz/pkgstores.py	42.45% <0.00%> (-11.72%)	⬇️

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[janjagusch]

Thanks for merging this so quickly, @wolfv! Would it be too much to ask for a new Quetz release, so we try out this feature? 👼