Move Drupal templates into the PHP directory

templates/php/drupal/phpstan.neon.dist.twig

@@ -0,0 +1,18 @@
+# {{ managedText | raw }}
+
+parameters:
+  level: {{ php.phpstan.level }}
+{% if not experimental.runStaticAnalysisOnTests %}
+  excludePaths:
+    - *Test.php
+    - *TestBase.php
+{% endif %}
+  paths:
+    {% for path in php.phpstan.paths -%}
+    - {{ path }}
+    {%- endfor %}
+
+{% if php.phpstan.baseline %}
+includes:
+  - phpstan-baseline.neon
+{% endif %}