feat(z-image): add Z-Image Base (undistilled) model variant support#8799

lstein merged 10 commits intoinvoke-ai:maininvoke-ai/InvokeAI:mainfrom

Pfannkuchensack:feature/z-image-undistilled-supportPfannkuchensack/InvokeAI:feature/z-image-undistilled-supportCopy head branch name to clipboard