Update on "[ET-VK][12/n] aten.cat with more codegen"

1. The `aten.cat` operation are very straightforward using the `copy_*_node`.
2. Complexity comes from the code-gen. We need to introduce a `AT_TENSOR_LIST` type, which contains a list of `AT_TENSOR` with `is_in=True`. The tensor list itself as a container is not an `IOValueRef`, but the element inside are. It leads to some ugly if-then-else in the codegen.

Differential Revision: [D56626865](https://our.internmc.facebook.com/intern/diff/D56626865/)

[ghstack-poisoned]

Author: yipjustin

backends/vulkan/runtime/graph/ops/impl/Copy.cpp

@@ -8,9 +8,6 @@
 
 #include <executorch/backends/vulkan/runtime/graph/ops/OperatorRegistry.h>
 
-#include <executorch/backends/vulkan/runtime/api/api.h>
-#include <executorch/backends/vulkan/runtime/graph/Logging.h>
-
 #include <executorch/backends/vulkan/runtime/graph/ops/impl/utils/DimUtils.h>
 #include <executorch/backends/vulkan/runtime/graph/ops/impl/utils/KernelUtils.h>
 #include <executorch/backends/vulkan/runtime/graph/ops/impl/utils/TensorUtils.h>