Size test all ops (#3522)

Summary: Pull Request resolved: #3522

Test Plan:
Imported from GitHub, without a `Test Plan:` line.

```
bash test/build_size_test.sh

ExecuTorch with no ops binary size, unstripped:
-rwxr-xr-x 1 lfq users 68448 May  6 13:57 cmake-out/test/size_test
ExecuTorch with portable ops binary size, unstripped:
-rwxr-xr-x 1 lfq users 27129992 May  6 13:57 cmake-out/test/size_test_all_ops
```

Reviewed By: mergennachin

Differential Revision: D57017805

Pulled By: lucylq

fbshipit-source-id: 330645325a5e784670092e5b34b19a2531b99ea1

Author: lucylq

test/CMakeLists.txt

@@ -57,5 +57,16 @@ if(CMAKE_BUILD_TYPE EQUAL "Release")
   target_link_options(size_test PRIVATE "LINKER:--gc-sections")
 endif()
 
+#
+# size_test_all_ops: binary with portable ops and no delegate backend
+#
+add_executable(size_test_all_ops ${_size_test__srcs})
+target_link_options_shared_lib(portable_ops_lib)
+target_link_libraries(size_test_all_ops executorch
+  portable_ops_lib portable_kernels)
+if(CMAKE_BUILD_TYPE EQUAL "Release")
+  target_link_options(size_test_all_ops PRIVATE "LINKER:--gc-sections")
+endif()
+
 # Print all summary
 executorch_print_configuration_summary()

test/build_size_test.sh

@@ -46,11 +46,14 @@ cmake_install_executorch_lib() {
 test_cmake_size_test() {
     retry cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=cmake-out -Bcmake-out/test test
 
-    echo "Build selective build test"
+    echo "Build size test"
     cmake --build cmake-out/test -j9 --config Release
 
-    echo 'Size of the binary:'
+    echo 'ExecuTorch with no ops binary size, unstripped:'
     ls -al cmake-out/test/size_test
+
+    echo 'ExecuTorch with portable ops binary size, unstripped:'
+    ls -al cmake-out/test/size_test_all_ops
 }
 
 if [[ -z $BUCK2 ]]; then