## Summary
Update Simple Upscale Button to work with spandrel models, add
UpscaleWarning when models aren't available, clean up ESRGAN logic
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## Related Issues / Discussions
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## QA Instructions
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## Merge Plan
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## Checklist
- [ ] _The PR has a short but descriptive title, suitable for a
changelog_
- [ ] _Tests added / updated (if applicable)_
- [ ] _Documentation added / updated (if applicable)_
## Summary
ControlNet code from #6577.
## Related Issues / Discussions
#6606https://invokeai.notion.site/Modular-Stable-Diffusion-Backend-Design-Document-e8952daab5d5472faecdc4a72d377b0d
## QA Instructions
Run with and without set `USE_MODULAR_DENOISE` environment.
## Merge Plan
Merge #6641 firstly, to be able see output difference properly.
If you think that there should be some kind of tests - feel free to add.
## Checklist
- [x] _The PR has a short but descriptive title, suitable for a
changelog_
- [ ] _Tests added / updated (if applicable)_
- [ ] _Documentation added / updated (if applicable)_
## Summary
Rescale CFG code from #6577.
## Related Issues / Discussions
#6606https://invokeai.notion.site/Modular-Stable-Diffusion-Backend-Design-Document-e8952daab5d5472faecdc4a72d377b0d
## QA Instructions
Run with and without set `USE_MODULAR_DENOISE` environment.
~~Note: for some reasons there slightly different output from run to
run, but I able sometimes to get same output on main and this branch.~~
Fix presented in #6641.
## Merge Plan
~~Nope.~~ Merge #6641 firstly, to be able see output difference
properly.
If you think that there should be some kind of tests - feel free to add.
## Checklist
- [x] _The PR has a short but descriptive title, suitable for a
changelog_
- [ ] _Tests added / updated (if applicable)_
- [ ] _Documentation added / updated (if applicable)_
