PR #10711: [GPU][NFC] Clarify dependency of cuDNN fusion compilation on stream executor and cuDNN handle.
PR #10711: [GPU][NFC] Clarify dependency of cuDNN fusion compilation on stream executor and cuDNN handle.

Imported from GitHub PR https://github.com/openxla/xla/pull/10711

LocalCuDnnHandle can now be created only via CudnnAccess which ensures that main cuDNN handle is created first. 

DnnGraph methods using cuDNN handle now require DnnSupport&.
Copybara import of the project:

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44baf4b48b9cedc762a77d3087db0581581a03a7 by Ilia Sergachev <isergachev@nvidia.com>:

[GPU][NFC] Clarify dependency of cuDNN fusion compilation on stream executor and cuDNN handle.

Merging this change closes #10711

FUTURE_COPYBARA_INTEGRATE_REVIEW=https://github.com/openxla/xla/pull/10711 from openxla:cudnn_handle_cleanup 44baf4b48b9cedc762a77d3087db0581581a03a7
