Allow render-to-tex with > 16 y offset.

Trying to keep it cautious in case our sizes are wrong.
Add memory breakpoints on sceIo read/write.
Detach a format mismatch that's not rendering.

Assume we'd be better off reading ram.
Just don't use render-to-text format mismatches.

This already excludes CLUTs.
Merge pull request #6300 from unknownbrackets/gpu-blocktransfer

Try to handle more block transfer / tex render cases