Gets MyPy pre-commit hook to run on all files.

[jeanluciano]

This PR updates .pre-commit-config.yaml to run on the src directory. It all fixes all current errors in CI.

[linear]

ENG-1335 Fix mypy issues in precommit hook

We are currently getting the mypy errors below when running the hook on the entire repo.

src/prefect_cloud/utilities/callables.py:41: error: Unexpected argument to "TypeVar()": "infer_variance"  [misc]
src/prefect_cloud/utilities/callables.py:344: error: Incompatible types in assignment (expression has type "type[_empty]", variable has type "expr | None")  [assignment]
src/prefect_cloud/utilities/callables.py:346: error: Incompatible types in assignment (expression has type "type[_empty]", variable has type "expr | None")  [assignment]
src/prefect_cloud/utilities/callables.py:367: error: Incompatible types in assignment (expression has type "type[_empty]", variable has type "expr | None")  [assignment]
src/prefect_cloud/utilities/callables.py:369: error: Incompatible types in assignment (expression has type "type[_empty]", variable has type "expr | None")  [assignment]
src/prefect_cloud/utilities/callables.py:402: error: Incompatible types in assignment (expression has type "type[_empty]", variable has type "expr | None")  [assignment]
src/prefect_cloud/utilities/callables.py:404: error: Incompatible types in assignment (expression has type "type[_empty]", variable has type "expr | None")  [assignment]
src/prefect_cloud/utilities/callables.py:412: error: Incompatible types in assignment (expression has type "list[None]", variable has type "list[expr | None]")  [assignment]
src/prefect_cloud/utilities/callables.py:412: note: "List" is invariant -- see https://mypy.readthedocs.io/en/stable/common_issues.html#variance
src/prefect_cloud/utilities/callables.py:412: note: Consider using "Sequence" instead, which is covariant
src/prefect_cloud/utilities/callables.py:414: error: Unsupported operand types for + ("list[None]" and "list[expr | None]")  [operator]
src/prefect_cloud/utilities/callables.py:449: error: Incompatible types in assignment (expression has type "type[_empty]", variable has type "expr | None")  [assignment]
src/prefect_cloud/schemas/objects.py:138: error: Library stubs not installed for "croniter"  [import-untyped]
src/prefect_cloud/schemas/objects.py:138: note: Hint: "python3 -m pip install types-croniter"
src/prefect_cloud/schemas/objects.py:138: note: (or run "mypy --install-types" to install all missing stub packages)
src/prefect_cloud/schemas/objects.py:138: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
src/prefect_cloud/auth.py:107: error: "Coroutine[Any, Any, tuple[str, str, str]]" object is not iterable  [misc]
src/prefect_cloud/auth.py:109: error: Cannot determine type of "api_url"  [has-type]
src/prefect_cloud/auth.py:110: error: Cannot determine type of "api_key"  [has-type]
src/prefect_cloud/completions.py:34: error: "_AsyncGeneratorContextManager[PrefectCloudClient]" has no attribute "__enter__"  [attr-defined]
src/prefect_cloud/completions.py:34: error: "_AsyncGeneratorContextManager[PrefectCloudClient]" has no attribute "__exit__"; maybe "__aexit__"?  [attr-defined]
src/prefect_cloud/cli.py:169: error: Argument 1 to "exit_with_error" has incompatible type "MissingProfileError"; expected "str"  [arg-type]
src/prefect_cloud/cli.py:304: error: "Coroutine[Any, Any, tuple[str, str, str]]" object is not iterable  [misc]
src/prefect_cloud/cli.py:306: error: Cannot determine type of "ui_url"  [has-type]
src/prefect_cloud/cli.py:308: error: "DeploymentFlowRun" has no attribute "name"  [attr-defined]

[chrisguidry]

YES

[chrisguidry]

Actually, could we also do the test suite? Maybe just remove the filter?

[chrisguidry]

If it's a lot of noise, we could do that in a separate PR

[jeanluciano]

Nope I like that better.