Further improve settings for extra tests from GitLab

tests/lakedrops.yml

@@ -38,8 +38,7 @@ Test Code Style:
   dependencies:
     - 'Build Site'
   rules:
-    - if: '$DISABLE_CI_TEST_CODESTYLE == "1"'
-      when: never
+    - if: '$DISABLE_CI_TEST_CODESTYLE != "1"'
 
 Test PHPUnit:
   <<: *test_lakedrops_default