[Bug]: Init file cannot mount voice sound banks of maps/mods

### Describe the Bug

Maps/mods mount sounds through the `root/sounds/` folder, but if you try to mount `/Voice/US/` it says that there is a conflict and it doesn't mount because the init file just uses the directory/file name to determine conflicts.

### Reproduce the bug

Add a folder called `voice` to a map or mod and see in the log that it fails to mount due to a conflict:
```
info: Found conflicting sound banks for map: 'openworldsix.v0001', cannot mount the sound bank(s):
info: - Conflicting sound bank: 'voice' of map 'openworldsix.v0001' is conflicting with a sound bank from: 'FA installation'
```

As for testing if the voice banks work, copy over some existing game bank into a `/voice/US/` directory and use PlayVoice with the appropriate bank and cue to see if it works.

### Screenshots

_No response_

### Additional context

_No response_

Start by locating the init file that mounts map and mod sound banks, then reproduce the conflict with a folder named voice under root/sounds/. Test with an existing game bank copied to /voice/US/ and PlayVoice; done means the voice bank mounts without the false conflict and the cue plays.

Written by the indexing model from the issue text.