Test workflow dispatch (#9283)

Co-authored-by: gemini-cli-robot <gemini-cli-robot@google.com>

.github/actions/run-tests/action.yml

@@ -5,8 +5,8 @@ inputs:
   force_skip_tests:
     description: 'Whether to force skip the tests.'
     required: false
-    type: 'boolean'
-    default: false
+    type: 'string'
+    default: 'false'
   gemini_api_key:
     description: 'The API key for running integration tests.'
     required: true