Show output of the size command in size test scripts (#12018)

I find this more useful than raw file size, because it breaks down size
by section of the binary and splits out debug info.

Author: swolchok

test/build_optimized_size_test.sh

@@ -41,12 +41,15 @@ test_cmake_size_test() {
 
     echo 'ExecuTorch with no ops binary size, unstripped:'
     ls -al cmake-out/test/size_test
+    size cmake-out/test/size_test
 
     echo 'ExecuTorch with portable ops binary size, unstripped:'
     ls -al cmake-out/test/size_test_all_ops
+    size cmake-out/test/size_test_all_ops
 
     echo 'ExecuTorch with optimized ops binary size, unstripped:'
     ls -al cmake-out/test/size_test_all_optimized_ops
+    size cmake-out/test/size_test_all_optimized_ops
 }
 
 if [[ -z $PYTHON_EXECUTABLE ]]; then

test/build_size_test.sh

@@ -46,9 +46,11 @@ test_cmake_size_test() {
 
     echo 'ExecuTorch with no ops binary size, unstripped:'
     ls -al cmake-out/test/size_test
+    size cmake-out/test/size_test
 
     echo 'ExecuTorch with portable ops binary size, unstripped:'
     ls -al cmake-out/test/size_test_all_ops
+    size cmake-out/test/size_test_all_ops
 }
 
 if [[ -z $PYTHON_EXECUTABLE ]]; then