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f6f090df - Add FP4 tensor creation support for autotuning (#176544)

Add FP4 tensor creation support for autotuning (#176544) Summary: X-link: https://github.com/pytorch/pytorch/pull/176544 Approved by: https://github.com/mlazos ghstack dependencies: #176543 Reviewed By: huydhn Differential Revision: D96091910 fbshipit-source-id: 923be0f1557329a463c35ee218e5eb261d048a75