CUDA: add set rows for f32 and f16 (#14551)

* CUDA: add set rows for f32 and f16

* Review: change kernel params, use strides from host

* Use 1-d kernel

* Review: use int64_t for blockDim.x, rename nb->s for clarity

ggml/src/ggml-cuda/set-rows.cuh

@@ -0,0 +1,7 @@
+#pragma once
+
+#include "common.cuh"
+
+#define CUDA_SET_ROWS_BLOCK_SIZE 256
+
+void ggml_cuda_op_set_rows(ggml_backend_cuda_context & ctx, ggml_tensor * dst);