<3>WSL (424) ERROR: UtilTranslatePathList:2866: Failed to translate M:\vcpkg

### Windows Version

Microsoft Windows [Version 10.0.22631.4037]

### WSL Version

2.2.4.0

### Are you using WSL 1 or WSL 2?

- [ ] WSL 2
- [X] WSL 1

### Kernel Version

5.15.153.1-2

### Distro Version

Ubuntu 22.04

### Other Software

SUBST

### Repro Steps

1. Use SUBST to create a new drive letter from an existing path.
2. Add a folder on the new drive to the PATH.
3. Start a new terminal (so that the new PATH is loaded).
4. Start Ubuntu and observe the error as the first line in the Ubuntu terminal window.

### Expected Behavior

I expect a valid path to actually be valid. I don't expect a program to exclude specific drives based on what type of drive they might be. I don't expect a path error naming an existing location every time I start Ubuntu.

### Actual Behavior

These are _always_ the first two lines in my Ubuntu terminal window:
```
<3>WSL (424) ERROR: UtilTranslatePathList:2866: Failed to translate M:\vcpkg
root@Barney:~#
```

### Diagnostic Logs

[WslLogs-2024-09-10_10-07-47.zip](https://github.com/user-attachments/files/16946213/WslLogs-2024-09-10_10-07-47.zip)

Start by reproducing the issue with WSL 1, Ubuntu 22.04, Windows 10.0.22631.4037, and a SUBST drive mapped into PATH; review the attached diagnostic logs alongside the reported UtilTranslatePathList error. Done means starting Ubuntu no longer reports a translation failure for the existing M:\vcpkg path.

Written by the indexing model from the issue text.