Trigger mypy on changed bazel files

It is quite likely that we miss issues not doing so.

Change-Id: I5c2ef85021cf27c3d04e75b6b3362e0c9bdd7c25

Author: LarsMichelsen

buildscripts/scripts/stages.yml

@@ -396,7 +396,7 @@ STAGES:
       RESULT_CHECK_FILE_PATTERN: "results/results.sarif"
 
     - NAME: "Type repository with mypy"
-      ONLY_WHEN_NOT_EMPTY: CHANGED_REFERENCE_IMAGE,CHANGED_FIND_PYTHON_FILES_SCRIPT,CHANGED_PYTHON_FILES
+      ONLY_WHEN_NOT_EMPTY: CHANGED_REFERENCE_IMAGE,CHANGED_FIND_PYTHON_FILES_SCRIPT,CHANGED_PYTHON_FILES,CHANGED_BAZEL_FILES
       COMMAND: |
           set +e
           bazel \