Update fastapi to 0.123.4 and get_openapi() fork

[nsoranzo]

Fix #21375 .

How to test the changes?

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• I've included appropriate automated tests.
• This is a refactoring of components with existing test coverage.
• Instructions for manual testing are as follows:
  1. [add testing steps and prerequisites here if you didn't write automated tests covering all your changes]

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.

[nsoranzo]

I suspect I am hitting fastapi/fastapi#14376 , as the OpenAPI linting tests pass on my fork.

Edit: And in fact, they passed with a rerun.

[nsoranzo]

Integration test failure unrelated.

[mvdbeek]

These should probably have different names ? This one is the hash as specified by a user, the other one describe the actual hash. galaxy__tool_util_models__parameters__DatasetHash seems like something that will change in the future, but we'd like to be able to have a somewhat stable schema.

[nsoranzo]

I still don't understand how these names are picked by fastapi.
The DatasetPermissions one is even more obscure, as the only other Python class with the same name is in galaxy.model.
If you have any pointer or suggestion on how to fix them, that would be appreciated!