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ef3ce35e - Enable cublas for FP8 rowwise

Enable cublas for FP8 rowwise Summary: Enabling cublas for FP8 rowwise. Also adding support for fp8_fast_accum. Reviewed By: xuzhao9 Differential Revision: D61735547 fbshipit-source-id: d93f1a7c5867fe728088637d4fd4fea592ff3ee8