Inverted predictions don't flow cleanly into SaveImage / can't switch collate fn in Invertd

Inverted predictions don't flow cleanly into SaveImage / can't switch collate fn in Invertd: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). The pre-transforms apply spatial transforms with different parameters per sample (random crops / spacings), so after…