Add 'kind:tests' label for PRs that only modify test files

Author: henry3260

.github/boring-cyborg.yml

@@ -365,6 +365,21 @@ labelPRBasedOnFilePath:
     - docker-stack-docs/**/*
     - airflow-ctl/docs/**/*
 
+  kind:tests:
+    - airflow-core/tests/**/*
+    - task-sdk/tests/**/*
+    - airflow-ctl/tests/**/*
+    - airflow-ctl-tests/**/*
+    - airflow-e2e-tests/**/*
+    - clients/**/test*.py
+    - devel-common/tests/**/*
+    - dev/breeze/tests/**/*
+    - docker-tests/**/*
+    - helm-tests/**/*
+    - kubernetes-tests/**/*
+    - task-sdk-integration-tests/**/*
+    - providers/**/tests/**/*
+
   area:helm-chart:
     - chart/**/*