[chore] Enable ruff rules UP006 and UP007 to improve type hints.

[fpgmaas]

This PR proposes to enable the following rules in ruff:

• UP006
• UP007

This implements changes as proposed by PEP585 and PEP604. For example, this changes

from typing import List

def foo(
        documents: List[str],
        top_k: Optional[int] = None,
        ...
)

to

def foo(
        documents: list[str],
        top_k: int | None = None,
        ...
)

Steps to create this PR were simply updating the pyproject.toml and then running ruff check --unsafe-fixes.

[tomaarsen]

Thank you! I think this'll be quite useful. Would you be able to resolve the conflicts in #2834?

• Tom Aarsen