Cd tab completion with CDPATH

[Sayanel01]

Description / Steps to reproduce the issue

Set your CDPATH variable to contain a path

$ mkdir /c/some/path/myfolder
$ CDPATH=.:/c/some/path
$ cd myf<TAB>

Expected behavior

With this CDPATH, cd myfolder is a valid command that sends you to /c/some/path/myfolder
When pressing TAB, you expect cd myf to autocomplete to cd myfolder

Actual behavior

No autocompletion happens.
Autocompletion works with directly accessible path, but not for path accessible with CDPATH.

Verification

• I have verified that my MSYS2 is up-to-date before submitting the report (see https://www.msys2.org/docs/updating/)

Windows Version

MINGW64_NT-10.0-19045

Are you willing to submit a PR?

I'm not sure I know how to contribute. But I know latest bash-completion do support CDPATH (https://github.com/scop/bash-completion)