pyright type checking seems to be unused. mypy still being used.

[pygeek]

We added pyright in 3.0.3 (see: #5457), but mypy is still being used for type checking https://github.com/pallets/flask/blob/main/tox.ini#L29-L32, and pyright is not.

If this was an intentional change of type checkers, then would expect that mypy be completely removed, and pyright be the command run in tox typing.

It should be noted, however, that running pyright yields 90 errors (71 tests/19 src). Is there an upgrade path or was this an oversight?

Environment:

• Python version:
• 3.12
• Flask version:
• 3.0.3