feat: add option to disable settings restore - performance boost

[prodigy]

Description

Adds an option to disable restoring settings after each render. This massively increases the performance by not loading two models for each render request. By also enabling model caching, the speed for rendering different models is dramatically increased.

This obviously is a worker only mode where no users actively use the web ui. As my machine otherwise more or less idles during my workday, I disabled the worker when I wanted to render images myself. With this feature I can simply increase the time between jobs and enable the restore option.

This fits into #17

Type of changes

• [ ] Bugfix
• [x] Feature
• [ ] Refactoring
• [ ] Optimization
• [ ] Documentation
• [ ] CI/CD
• [ ] Other

Please check the following items before submitting your pull request

• [x] I've checked that this isn't a duplicate pull request.
• [x] I've tested my changes with the latest SD-Webui version.
• [x] I've format my code with black: black .
• [x] I've lint my code with flake8: flake8 .
• [x] I've read the Contribution Guidelines
• [x] I've read the Code of Conduct

[MaikoTan]

I didn't see there is an option called restore_settings in sd-webui side, can you explain why this work?

Also, please resolve the conflict.

[prodigy]

The merge conflict is resolved, also I fixed the option name so that it now uses the proper one. That was a replace error by me as black insisted on putting the code on one line and flake8 didn't want the line to be that long. So I couldn't use the name as the original option is named and had to shorten the config name.