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* CUDA: Simplify and improve CUDA graphs through use of indirect copy pointers Previously there was complexity in the CUDA graphs implementation due frequently changing parameters to copy kernels associated with K and V cache pointers. This patch simplifies by using indirection to avoid such parameters frequently changing, avoiding the need for frequent graph updates. Fixes #12152 * Addressed comments * fix HIP builds * properly sync to stream * removed ggml_cuda_cpy_fn_ptrs * move stream sync before free * guard to only use indirection with graphs * style fixes * check for errors --------- Co-authored-by: slaren <slarengh@gmail.com>