Get PHPStan running on Drupal 10 pt2

.gitlab-ci.yml

@@ -41,9 +41,8 @@ phpcs:
 phpstan:
   # Allow PHPStan to run on Drupal 10.
   rules:
-    - *opt-in-previous-major-rule
-    - *skip-phpstan-rule
-    - *php-files-exist-rule
+    - if: '$OPT_IN_TEST_PREVIOUS_MAJOR != "1" || $CORE_PREVIOUS_STABLE == ""'
+      when: never
   allow_failure: false
 phpstan (next major):
   allow_failure: true