[Python] Support lists of sources and destinations on pyarrow.fs.copy_files()

[Tom-Newton]

Describe the enhancement requested

I have a usecase where we want to copy a list of files from source to destination, and they are not all in a directory.

For example:

pyarrow.fs.copy_files(
    ["file0", "directory/file1"], ["directory/file0", "file1"], source_filesystem=..., destination_filesystem=...
)

I think it's reasonable not to support directories in the sources or destinations lists and assume required directories in the destination already exist.

On the C++ side this is already implemented https://github.com/apache/arrow/tree/main/cpp/src/arrow/filesystem/filesystem.cc#L625-L660

To keep compatibility of the public API we could support both list and individual value with something like https://github.com/apache/arrow/tree/main/python/pyarrow/acero.py#L295-L298

Component(s)

Python