Update django.contrib.staticfiles.finders.BaseFinder.find() (and subclasses) for all -> find_all argument rename

[joshuadavidthomas]

I'm currently implementing a custom static files finder, and have been running into type errors when testing on the first alpha release of Django 5.2.

Looks like in 5.2, the all argument to the find method on all finders has been renamed to find_all. The all argument has been marked as deprecated, slated for removal in Django 6.1.

The stubs for all the finders should be updated to handle both arguments until all has been deprecated.

Current stubs (BaseFinder):

django-stubs/django-stubs/contrib/staticfiles/finders.pyi

Lines 11 to 14 in 960bf6e

	@overload
	def find(self, path: str, all: Literal[False] = False) -> str | None: ...
	@overload
	def find(self, path: str, all: Literal[True]) -> list[str]: ...

Here's my attempt at fixing it (though I'm not totally sure about the overloads, a bit out of my element here):

@overload
def find(self, path: str, all: Literal[False] = False) -> str | None: ...
@overload
def find(self, path: str, all: Literal[True]) -> list[str]: ...
@overload
def find(self, path: str, find_all: Literal[False] = False) -> str | None: ...
@overload
def find(self, path: str, find_all: Literal[True]) -> list[str]: ...
def find(self, path: str, find_all: bool = False, **kwargs: Any) -> str | list[str] | None: ...

Happy to submit a PR for this.

Relevant commits:

• Intital change: django/django@0fdcf10
• Correction of deprecation version: django/django@8719a61