PR #11757: [GPU] Enable workspace support in cuDNN GEMM fusions.
PR #11757: [GPU] Enable workspace support in cuDNN GEMM fusions.

Imported from GitHub PR https://github.com/openxla/xla/pull/11757


Copybara import of the project:

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a2b4e3ec5f508e64301307b7eb39d7c4c7009023 by Ilia Sergachev <isergachev@nvidia.com>:

[GPU] Enable workspace support in cuDNN GEMM fusions.

Merging this change closes #11757

FUTURE_COPYBARA_INTEGRATE_REVIEW=https://github.com/openxla/xla/pull/11757 from openxla:cudnn_workspace a2b4e3ec5f508e64301307b7eb39d7c4c7009023
