[CUBLAS][CUDA GRAPHS] (re-re-re-re-open of #83461) Explicitly set the workspace for cuBLAS handles (#86645)
re-opening (again) in hopes of working around failed/stuck CLA check
CC @ptrblck @ngimel @huydhn
Pull Request resolved: https://github.com/pytorch/pytorch/pull/86645
Approved by: https://github.com/zdevito
