localfs: fix support for pathlib/os.PathLike objects in rm

[skshetry]

This fixes support for pathlib.Path objects in rm.

from fsspec import filesystem
from pathlib import Path

fs = filesystem("file")
fs.rm(Path("file"))

[efiop]

@skshetry We don't use pathobjects though.

[efiop]

This implementation is more correct overall, even not thinking about pathlib. 👍

[efiop]

Oops, I think I confused this with dvc-objects.fs in my comments 😅 Still, this is indeed more correct.

[skshetry]

LocalFileSystem does support os.PathLike objects, via LocalFileSystem._strip_protocol -> stringify_paths. This has nothing to do with DVC, just fixing support.

[martindurant]

OK, this makes sense. I bet there are other instances of this in the codebase.

[skshetry]

They are in AbstractFileSystem, especially in put/expand_path/pipe/cat/get. Will have to look into them separately.