[Feature Request]: Please support "--use-cpu gfpgan codeformer" Start Prompt

### Is there an existing issue for this?

- [X] I have searched the existing issues and checked the recent builds/commits

### What would your feature do ?

Enables Face Restoration to run on CPU, since IPEX has issues with it and it only works if it runs via the CPU

### Proposed workflow

Just want "--use-cpu gfpgan codeformer" starting prompt to work like in A1111 or SD.Next so either face restoration model runs on the CPU. This sadly doesn't seem to work on forge.

### Additional information

_No response_

Start by locating Forge's command-line handling for --use-cpu and the face-restoration path for GFPGAN and CodeFormer, then inspect how device selection currently works. Done means the --use-cpu gfpgan codeformer prompt is accepted and either face-restoration model runs on the CPU without the IPEX issue.

Written by the indexing model from the issue text.