[ROCm] fix kernel explorer GemmSoftmaxGemm test#16735
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GemmSoftmaxGemmTunble occasionally broken with large numerical error. The root cause of this error is CK's Strided Batched Gemm has larger error under a specific initialization distribution
(multinormal_distribution).Generic(Gemm1 + Softmax + Gemm2) implementation is one instance of GemmSoftmaxGemmTunble. Gemm1 and Gemm2 in Generic implementation are TunableOps when tuning enabled. In some case GemmSoftmaxGemmTunble select Generic implentation, while Gemm1 or Gemm2 select ck implementation, the result of GemmSoftmaxGemmTunble affect by CK.
GemmSoftmaxGemmPermuteGenericNestedTunableto test Generic implementation with tuning enabled.