trunk/1021ddaa95dbaec8775442af63d998591b50a353: Key sparse Triton tuning tables by the current accelerator (#194176)

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Related to this RFC: #194355 Summary _get_device_name() supplies the device component of the key under which _operation_device_version_data stores tuned Triton parameters. It was a two-branch chain over torch.cuda and torch.xpu returning "" for anything else, and it took no arguments -- so the key named whatever the process was configured for, never the device the inputs were actually on. An accelerator outside that…

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