sycl : Remove waits from function calls (#13702)

* removes the waits in async memcpy functions

ggml/src/ggml-sycl/ggml-sycl.cpp

@@ -3740,7 +3740,7 @@ static void ggml_backend_sycl_get_tensor_async(ggml_backend_t backend,
     GGML_ASSERT(buf->buft == ggml_backend_sycl_buffer_type(sycl_ctx->device) && "unsupported buffer type");
     const queue_ptr stream = sycl_ctx->stream(sycl_ctx->device, 0);
     SYCL_CHECK(CHECK_TRY_ERROR((stream)->memcpy(
-        data, (const char *)tensor->data + offset, size).wait()));
+        data, (const char *)tensor->data + offset, size)));
 }
 catch (sycl::exception const &exc) {
   std::cerr << exc.what() << "Exception caught at file:" << __FILE__
@@ -3760,7 +3760,7 @@ static bool ggml_backend_sycl_cpy_tensor_async(ggml_backend_t backend,
         */
         const queue_ptr stream = sycl_ctx->stream(sycl_ctx->device, 0);
         SYCL_CHECK(CHECK_TRY_ERROR((stream)->memcpy(
-            dst->data, src->data, ggml_nbytes(dst)).wait()));
+            dst->data, src->data, ggml_nbytes(dst))));
         return true;
     }