Given a `pathlib.Path` that contains symlinked subfolders, `Path.glob` (and `.rglob`) do not follow symlinks.  This is not consistent with `glob.glob` which does.

For example given the following:
C:\Folder
C:\Folder\Subfolder -> D:\Subfolder
D:\Subfolder\File.txt

`pathlib.Path('C:/Folder').glob('**/*')` yields the following paths:
WindowsPath('C:/Folder/Subfolder')

`glob.glob('C:/Folder/**/*')` yields the following paths:
'C:/Folder\\Subfolder'
'C:/Folder\\Subfolder\\File.txt'

Notice how the contents of Subfolder are present in the `glob.glob` results but not for `Path.glob`.

I would expect `Path.glob` to be consistent with `glob.glob`.  This is not the only inconsistency (e.g. #22276, #31202) and perhaps `Path.glob` should be re-implemented using `glob.glob`.

This looks like an issue specific to Windows?  I can't replicate on Mac, and given Windows' method of implementing "symlinks" as junctions.

Windows does not implement symlinks as junctions.  Windows has hardlinks, symlinks and junctions which are all distinctly different in behaviour.

I don't doubt that this is a Windows-specific issue, although I have not tested other platforms.  Path.glob and .rglob does work for junctions and hardlinks but glob.glob works consistently for all three.

I can reproduce the bug with Linux and python 3.7.5:

```
Python 3.7.5 (default, Apr 19 2020, 20:18:17) 
[GCC 9.2.1 20191008] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from pathlib import Path
>>> Path('a/b').mkdir(parents=True)
>>> Path('c/d').mkdir(parents=True)
>>> Path('a/c').symlink_to('../c')
>>> Path('e').symlink_to('c')
>>> list(Path('.').rglob('*'))
[PosixPath('e'), PosixPath('c'), PosixPath('a'), PosixPath('c/d'), PosixPath('a/c'), PosixPath('a/b')]
```

Expected result:

```
[PosixPath('e'), PosixPath('e/d'), PosixPath('c'), PosixPath('a'), PosixPath('c/d'), PosixPath('a/c'), PosixPath('a/c/d'), PosixPath('a/b')]
```