feat: Add High Resolution Fix to SDXL Linear Flow by marict

[marict]

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

• [ ] Refactor
• [x] Feature
• [ ] Bug Fix
• [ ] Optimization
• [ ] Documentation Update
• [ ] Community Node Submission

Have you discussed this change with the InvokeAI team?

• [x] Yes
• [ ] No, because:

Have you updated all relevant documentation?

• [x] Yes
• [ ] No

Description

Adds the high resolution fix feature to the SDXL linear flow.

Related Tickets & Documents

• Related Issue #6618
• Closes #6618

QA Instructions, Screenshots, Recordings

Added/updated tests?

• [ ] Yes
• [x] No : Front end change

[psychedelicious]

Brief update - I've gotten HRF working in the canvas v2 branch. Needs a bit of UX tweaking but I think there's a path forward with HRF.

[psychedelicious]

Thanks for your time on this @marict. Closing this older PR, at some point soon I'll get the updated Canvas v2 HRF merged in.