[NCCL] Cleanup NCCL-no-record streams, move to `TORCH_NCCL_AVOID_RECORD_STREAMS` (#97053)
Cleanup of #89880 including moving environment variable to `TORCH_*` prefix and a warning condition fix.
CC @ptrblck @kwen2501
Pull Request resolved: https://github.com/pytorch/pytorch/pull/97053
Approved by: https://github.com/kwen2501
