Enabling Dtype Selective Build for Zephyr CI Add Model Test (#13191)

### Summary
In the baseline version of this test, only operator selective build is
used. A CMake command line option was created to pass in an exported
model's PTE file via command line so that the model API for data type
selective build can be used. Adding verbose error checking to make logs
more informative.

### Test plan
Ran with and without the flag set, and saw that enabling data type
selective build reduces memory footprint. Specifically for the example
add model, operator library shrinks from ~127KB to ~83KB.

Author: BujSet

.github/workflows/trunk.yml

@@ -80,20 +80,23 @@ jobs:
         export ZEPHYR_PROJ_ROOT=$(realpath $(pwd))
         export ARM_FVP_TUTORIALS_ROOT=$ZEPHYR_PROJ_ROOT/zephyr/samples/modules/executorch/arm-fvp-tutorials
 
+        # TODO @Bujji: Should see if this can be moved into the docker image itself
         download_arm_zephyr_sdk
         ./zephyr-sdk-0.16.0/setup.sh -c -t arm-zephyr-eabi
-
         cd $ZEPHYR_PROJ_ROOT
         setup_zephyr_et_module
 
+        # Run setup scripts for Arm FVP and Arm AOT Compilation
         cd $ZEPHYR_PROJ_ROOT/modules/lib/executorch
         install_executorch "--use-pt-pinned-commit"
         .ci/scripts/setup-arm-baremetal-tools.sh --target-toolchain zephyr
         source examples/arm/ethos-u-scratch/setup_path.sh
         source $ZEPHYR_PROJ_ROOT/zephyr/zephyr-env.sh
 
         # Get the model as PTE
-        python -m examples.arm.aot_arm_compiler --model_name="${MODEL_NAME}" --output="${MODEL_NAME}.pte"
+        python -m examples.arm.aot_arm_compiler \
+            --model_name="${MODEL_NAME}" \
+            --output="${MODEL_NAME}.pte"
 
         # Generate the C-style header
         cd $ARM_FVP_TUTORIALS_ROOT
@@ -105,7 +108,8 @@ jobs:
         cd $ARM_FVP_TUTORIALS_ROOT/models/${MODEL_NAME}/
 
         # Build the zephyr elf
-        west build -p always -b mps3/corstone300/fvp
+        west build -p always -b mps3/corstone300/fvp -- \
+            -DET_PTE_FILE_PATH_FOR_SELECTIVE_BUILD=$ZEPHYR_PROJ_ROOT/modules/lib/executorch/${MODEL_NAME}.pte
 
         # Run the simulation
         FVP_Corstone_SSE-300_Ethos-U55 -a build/zephyr/zephyr.elf \
@@ -116,21 +120,29 @@ jobs:
             -C cpu0.CFGDTCMSZ=15 \
             --simlimit 120
 
+        # Disable exit on error
+        set +e
         # Report failure if any of the ouptut verification checks fail
+        # store 0 if found (failure), 1 if not (success)
         grep -qF "ERROR" sim.out
-        exit_status=$? #store 0 if found (failure), 1 if not (success)
+        exit_status=$?
         if [[ "$exit_status" -eq "0" ]]; then
-          cat sim.out
-          exit 1
+            cat sim.out
+            set -e
+            exit 1
         fi
 
         # Report fail if simulation does not complete successfully
+        # store 0 if found (success), 1 if not (failure)
         grep -qF "SUCCESS: Program complete, exiting." sim.out
-        exit_status=$? #store 0 if found (success), 1 if not (failure)
+        exit_status=$?
         if [[ "$exit_status" -eq "1" ]]; then
-          cat sim.out
-          exit 1
+            cat sim.out
+            set -e
+            exit 1
         fi
+        # Re-enable exit on error
+        set -e
 
   test-models-linux-aarch64:
     name: test-models-linux-aarch64