[FSDP2] Auto-exclude non-floating frozen Params4bit from fully_shard to prevent QLoRA crash#3987

SunMarc merged 4 commits intohuggingface:mainhuggingface/accelerate:mainfrom

roycho96:fix/fsdp2-auto-ignoreroycho96/accelerate:fix/fsdp2-auto-ignoreCopy head branch name to clipboard