Fix(CI): build app job depends on test and lint jobs

.gitlab-ci.yml

@@ -407,10 +407,8 @@ build_docs:
 build_app:
   stage: build
   needs:
-    # The test_app job is currently disabled
-    # - job: test_app
+    - job: test_app
     - job: lint_app
-      optional: true
   rules:
     - if: $CI_COMMIT_BRANCH =~ /(stable|develop)/
     - changes: [app/**/*]