GH-125413: Add `pathlib.Path.info` attribute by barneygale · Pull Request #127730 · python/cpython

When a path object is generated by `PathBase.iterdir()`, then its `_info`
attribute now stores a `os.DirEntry`-like object that can be used to query
the file type. This removes any need for a `_scandir()` method.

Currently the `_info` attribute is private and only guaranteed to be
populated in paths from `iterdir()`. Later on, I'm hoping to rename it to
`info` and ensure that it's populated for all kinds of paths (this probably
involves adding a `pathlib.FileInfo` class.) In the pathlib ABCs, `info`
will replace `stat()` as the lowest-level abstract file status querying
mechanism.