musa: extract ggml_cuda_mul_mat_batched_cublas_gemm_batched_ex#13887

yeahdongcn wants to merge 5 commits intoggml-org:masterggml-org/llama.cpp:masterfrom

makllama:xd/cublasGemmBatchedExmakllama/llama.cpp:xd/cublasGemmBatchedExCopy head branch name to clipboard