refactor(python): improve typing; many list types are better defined as Sequence

[alexander-beedie]

Ran through frame.py and lazyframe.py briefly; a lot (most) of the list[xyz] type decorators are better written as Sequence[xyz] so that they don't cause unnecessary linting errors when passing these params as tuples.

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Example: (from join_asof method)

# before
  by_left: str | list[str] | None = None,
  by_right: str | list[str] | None = None,
  by: str | list[str] | None = None,

# after
  by_left: str | Sequence[str] | None = None,
  by_right: str | Sequence[str] | None = None,
  by: str | Sequence[str] | None = None,