feat: default processors for controlnet & t2i adapter

[psychedelicious]

What type of PR is this? (check all applicable)

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update
• Community Node Submission

Have you discussed this change with the InvokeAI team?

• Yes
• No, because:

Description

• Make default settings in backend narrowed to individual model type. Main models and ControlNet/T2I Adapters have default settings so far, but they are totally different - main get VAE, CFG Scale, etc, while the control adapters only get preprocessor.
• Add model probe logic to attempt to autoselect a preprocessor for each control adapter type.
• Add tests for probe logic.
• Update UI to use control adapter default_settings to autoselect processor.
• Update MM tab's default settings - main models have a separate UI from the control adapters.

QA Instructions, Screenshots, Recordings

Use a fresh db so the probe can do its thing when it adds models. Suggest use_memory_db and skip_model_hash options in invokeai.yaml for speed.

• Select a canny model in MM tab. You should see default processor is canny.
• Add a ControlNet and select a canny model, processor should default to canny.
• Back to MM tab, change the default to something else.
• Change the model away from and back to canny - processor should default to the new selection.

Try another control net and/or t2i adapter.

Merge Plan

This PR can be merged when approved

[psychedelicious]

Supersedes #5888

[brandonrising]

works for me