Revert "[ATen][CUDA][CUBLAS] cublasLtMatmul increase workspace_size (#120925)"
This reverts commit 0a38a6ac8046e4d3f9cfaba86b7ec6517038646f.
Reverted https://github.com/pytorch/pytorch/pull/120925 on behalf of https://github.com/clee2000 due to broke inductor models and caused accuracy regression on nightly dashboard https://hud.pytorch.org/pytorch/pytorch/commit/0a38a6ac8046e4d3f9cfaba86b7ec6517038646f https://github.com/pytorch/pytorch/actions/runs/8118465367/job/22193590228 ([comment](https://github.com/pytorch/pytorch/pull/120925#issuecomment-1977556485))
