Add CFG Rescale option for supporting zero-terminal SNR models (#4335)

* add support for CFG rescale

* fix typo

* move rescale position and tweak docs

* move input position

* implement suggestions from github and discord

* cleanup unused code

* add back dropped FieldDescription

* fix(ui): revert unrelated UI changes

* chore(nodes): bump denoise_latents version 1.4.0 -> 1.5.0

* feat(nodes): add cfg_rescale_multiplier to metadata node

* feat(ui): add cfg rescale multiplier to linear UI

- add param to state
- update graph builders
- add UI under advanced
- add metadata handling & recall
- regen types

* chore: black

* fix(backend): make `StableDiffusionGeneratorPipeline._rescale_cfg()` staticmethod

This doesn't need access to class.

* feat(backend): add docstring for `_rescale_cfg()` method

* feat(ui): update cfg rescale mult translation string

---------

Co-authored-by: psychedelicious <4822129+psychedelicious@users.noreply.github.com>

invokeai/frontend/web/src/features/nodes/util/graph/buildLinearImageToImageGraph.ts

@@ -41,6 +41,7 @@ export const buildLinearImageToImageGraph = (
     negativePrompt,
     model,
     cfgScale: cfg_scale,
+    cfgRescaleMultiplier: cfg_rescale_multiplier,
     scheduler,
     seed,
     steps,
@@ -316,6 +317,7 @@ export const buildLinearImageToImageGraph = (
     {
       generation_mode: 'img2img',
       cfg_scale,
+      cfg_rescale_multiplier,
       height,
       width,
       positive_prompt: positivePrompt,