[php-symfony] Never return 406 when user accepts */*

When a query has header "Accept" set to "*/*" it means it accepts
everything. It is hence weird to return a 406.
This patch ensures it does not occur: when the query accepts everything
then we take any produced type.

This fixes #13334. This also partly makes the open PR #15560 obsolete
(or at least, it provides a workaround)

Author: gturri

modules/openapi-generator/src/main/resources/php-symfony/Controller.mustache

@@ -204,6 +204,10 @@ class Controller extends AbstractController
             return 'application/xml';
         }
 
+        if (in_array('*/*', $accept)) {
+            return $produced[0];
+        }
+
         // If we reach this point, we don't have a common ground between server and client
         return null;
     }

samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php

@@ -214,6 +214,10 @@ protected function getOutputFormat(string $accept, array $produced): ?string
             return 'application/xml';
         }
 
+        if (in_array('*/*', $accept)) {
+            return $produced[0];
+        }
+
         // If we reach this point, we don't have a common ground between server and client
         return null;
     }