Use fastapi_responses to include raised Exceptions in the openapi file

[armanddidierjean]

Description

Notes

• currently fastapi_responses does not support discovering custom HTTPExceptions (like ContentException from Add ContentHTTPException and AuthHTTPException #458)
• the last fastapi_responses version has a bug which may create an infinite loop, this happens with /auth/token
• only one exception can be included per status_code. This means that if an endpoint raise both HTTPException(404, "first error") and HTTPException(404, "second error"), only one of them will be included in the openapi schema

Checklist

• All tests passing
• Extended the documentation, if necessary

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.76%. Comparing base (4624083) to head (1aa741e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #459   +/-   ##
=======================================
  Coverage   82.76%   82.76%           
=======================================
  Files          98       98           
  Lines        6086     6088    +2     
=======================================
+ Hits         5037     5039    +2     
  Misses       1049     1049           

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