Update on "[slimtensor] Add from_etensor factory function for ETensor to SlimTensor conversion"

Add from_etensor() factory function that creates a SlimTensor from an ExecuTorch portable tensor (ETensor), copying data to a target device.

Key features:
- Handles int32_t to int64_t conversion for sizes/strides (ETensor uses int32_t, SlimTensor uses int64_t)
- Supports CPU and CUDA target devices via storage()->copy_()
- Preserves tensor strides (non-contiguous layouts)
- Provides both reference and pointer overloads

Differential Revision: [D90539554](https://our.internmc.facebook.com/intern/diff/D90539554/)

[ghstack-poisoned]

Author: Gasoonjia

backends/aoti/slim/core/test/test_as_strided.cpp

@@ -9,7 +9,7 @@
 #include <gtest/gtest.h>
 
 #include <executorch/backends/aoti/slim/core/slim_tensor.h>
-#include <executorch/backends/aoti/slim/core/slim_tensor_view_incl.h>
+
 #include <executorch/backends/aoti/slim/factory/empty.h>
 
 #ifdef CUDA_AVAILABLE

backends/aoti/slim/core/test/test_permute_reshape.cpp

@@ -9,7 +9,7 @@
 #include <gtest/gtest.h>
 
 #include <executorch/backends/aoti/slim/core/slim_tensor.h>
-#include <executorch/backends/aoti/slim/core/slim_tensor_view_incl.h>
+
 #include <executorch/backends/aoti/slim/factory/empty.h>
 
 #ifdef CUDA_AVAILABLE

backends/aoti/slim/core/test/test_slimtensor_copy.cpp

@@ -10,7 +10,7 @@
 
 #include <executorch/backends/aoti/slim/core/slim_tensor.h>
 #include <executorch/backends/aoti/slim/core/storage.h>
-#include <executorch/backends/aoti/slim/factory/empty.h>
+
 
 namespace executorch::backends::aoti::slim {
 

backends/cuda/CMakeLists.txt

@@ -97,12 +97,11 @@ install(
   DESTINATION lib
 )
 
-# CUDA-specific AOTI shim symbols (dynamically linked) Uses
-# common_shims_slim.cpp for SlimTensor-based shim implementations
+# CUDA-specific AOTI shim symbols (dynamically linked)
 set(_aoti_cuda_shim_sources
-    runtime/shims/memory.cpp runtime/guard.cpp runtime/shims/cuda_guard.cpp
-    runtime/shims/int4mm.cu ${EXECUTORCH_ROOT}/backends/aoti/common_shims.cpp
-    ${EXECUTORCH_ROOT}/backends/aoti/common_shims_slim.cpp
+    runtime/shims/memory.cpp runtime/shims/tensor_attribute.cpp
+    runtime/guard.cpp runtime/shims/cuda_guard.cpp runtime/shims/int4mm.cu
+    ${EXECUTORCH_ROOT}/backends/aoti/common_shims.cpp
 )
 
 add_library(aoti_cuda_shims SHARED ${_aoti_cuda_shim_sources})