Warn when KVM job didn't run

.gitlab-ci.yml

@@ -334,7 +334,17 @@ libs database schema:
     - kvm
   # Cache hits the storage limits in kvm runners quickly
   cache: []
+  artifacts:
+    reports:
+      codequality: codequality-warnings.json
   script:
+    - |
+      if [ -z "$RUN_KVM_JOBS" ]; then
+        echo "WARNING: RUN_KVM_JOBS environment variable is not set."
+        echo "This job requires a special KVM runner. Skipping with warning."
+        echo '[{"location":{"path":".gitlab-ci.yml","lines":{"begin":237}},"description":"KVM job was skipped: RUN_KVM_JOBS env variable is not set. Set it to 1 to enable this job.","check_name":"skipped_kvm_job","fingerprint":"skipped_kvm_job","severity":"minor"}]' > codequality-warnings.json
+        exit 42
+      fi
     - ./gradlew assembleFullDebug
     - export AVD_SDK=`echo $CI_JOB_NAME | awk '{print $2}'`
     - export AVD_TAG=`echo $CI_JOB_NAME | awk '{print $3}'`
@@ -354,7 +364,9 @@ libs database schema:
     - export FLAG="-Pandroid.testInstrumentationRunnerArguments.annotation=androidx.test.filters.FlakyTest"
     - for i in {1..5}; do echo "$i" && ./gradlew $FLAG :app:connectedBasicDebugAndroidTest :legacy:connectedFullDebugAndroidTest :libs:database:connectedCheck :libs:download:connectedAndroidTest :libs:index:connectedAndroidTest && break; done || exit 137
   allow_failure:
-    exit_codes: 137
+    exit_codes:
+      - 42
+      - 137
 
 kvm 24 default x86:
   <<: [ *test-template, *kvm-connected-template ]