Add output as an option in CUTLASS grouped GEMM (#4931) #15462

Job	Run time
generate-build-matrix / generate_ci_matrix	9s
build / build_artifact (3.13, x86, linux.12xlarge.memory, genai, gcc, 12.9.1)	1h 30m 26s
build / build_artifact (3.13, x86, linux.24xlarge.memory, hstu, gcc, 12.9.1)	33m 40s
build / build_artifact (3.13, x86, linux.24xlarge, default, gcc, 12.9.1)	56m 38s
generate-test-matrix / generate_ci_matrix	6s
test / test_and_publish_artifact (3.13, x86, linux.g5.4xlarge.nvidia.gpu, genai, gcc, 12.9.1)	12m 26s
test / test_and_publish_artifact (3.13, x86, linux.g5.4xlarge.nvidia.gpu, default, gcc, 12.9.1)	49m 36s
test / test_and_publish_artifact (3.13, x86, linux.g5.4xlarge.nvidia.gpu, hstu, gcc, 12.9.1)	10m 7s
	4h 13m 8s

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