Exclude ddev files from phpcs analysis

phpcs.xml.dist

@@ -20,6 +20,7 @@
   <exclude-pattern>_ignore</exclude-pattern>
   <exclude-pattern>\.patch</exclude-pattern>
   <exclude-pattern>interdif</exclude-pattern>
+  <exclude-pattern>\.ddev</exclude-pattern>
 
   <!-- Examples for how you disable rules you do not like. -->
   <!-- Exclude a sniff from running on specific files. -->