Update torch.distributed.run OMP_NUM_THREADS message to log.warning (#63953)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63953
Closes #61138
Test:
`python -m torch.distributed.run --nproc_per_node 2 test.py`
Still outputs message
`LOGLEVEL=ERROR python -m torch.distributed.run --nproc_per_node 2 test.py`
Does not output message anymore
cc pietern mrshenli pritamdamania87 zhaojuanmao satgera rohan-varma gqchen aazzolini osalpekar jiayisuse agolynski SciPioneer H-Huang mrzzd cbalioglu gcramer23
Test Plan: Imported from OSS
Reviewed By: malfet
Differential Revision: D30542997
Pulled By: H-Huang
fbshipit-source-id: e7da30dcda51516abf4e56f1f510132e44397027
