Added better exit code checks for CIV execution.

This allows the aws.sh script to finish gracefully in the event no test
cases were collected because the filters used actually did not select any
applicable test (e.g. "pub" marked tests for Image Builder internal CI).

Also added extra checks for infrastructure-related issues such as when
CIV exits with code 100 (introduced by us to identify deployment issues).

ci/aws.sh

@@ -289,8 +289,9 @@ sudo "${CONTAINER_RUNTIME}" run \
     -v "${TEMPDIR}":/tmp:Z \
     "${CONTAINER_CLOUD_IMAGE_VAL}" \
     python cloud-image-val.py \
-    -c /tmp/civ_config.yml \
-    && RESULTS=1 || RESULTS=0
+    -c /tmp/civ_config.yml
+
+CIV_EXIT_CODE=$?
 
 mv "${TEMPDIR}"/report.html "${ARTIFACTS}"
 
@@ -306,12 +307,23 @@ sudo composer-cli compose delete "${COMPOSE_ID}" > /dev/null
 
 # Use the return code of the smoke test to determine if we passed or failed.
 # On rhel continue with the cloudapi test
-if [[ $RESULTS == 1 ]]; then
-    greenprint "💚 Success"
-    exit 0
-elif [[ $RESULTS != 1 ]]; then
-    redprint "❌ Failed"
-    exit 1
-fi
-
-exit 0
+case $CIV_EXIT_CODE in
+    0)
+        greenprint "💚 Success"
+        exit 0
+        ;;
+    5)
+        echo "❗ No tests were run"
+        exit 0
+        ;;
+    100)
+        redprint "❌ Failed (cloud deployment/destroy issues)"
+        exit 1
+        ;;
+    *)
+        redprint "❌ Failed (exit code: ${CIV_EXIT_CODE})"
+        exit 1
+        ;;
+esac
+
+exit 0