Make ideep honor `torch.set_num_thread` changes (#53871)
Summary:
When compiled with OpenMP support `ideep`'s computational_cache would cache max number of OpenMP workers
This number could be wrong after `torch.set_num_threads` call, so clean it after the call.
Fixes https://github.com/pytorch/pytorch/issues/53565
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53871
Reviewed By: albanD
Differential Revision: D27003265
Pulled By: malfet
fbshipit-source-id: 1d84c23070eafb3d444e09590d64f97f99ae9d36
