[release/2.9] Port group_gemm commits from upstream PT #2829
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Ported below commits from upstream PT, modified code accordingly.
[ROCm] enable grouped gemm fallback
[ROCm] Enable group gemm through CK
[ROCm] Disable group gemm CK path when composable kernel (CK) is not enabled
Test command:
PYTORCH_TEST_WITH_ROCM=1 pytest test/test_matmul_cuda.py -v -k "test_grouped_gemm_2d_2d or test_grouped_gemm_2d_3d or test_grouped_gemm_3d_3d or test_grouped_gemm_3d_2d"
Cherry-picked to leo/test-ci branch via #2847