Auto-discover nested policies following conventional, parallel hierar…

…chy (#54493)

* Remove redundant check

* Support parallel conventional hierachies

* formatting

---------

Co-authored-by: Taylor Otwell <taylor@laravel.com>

Access/Gate.php

@@ -703,6 +703,9 @@ protected function guessPolicyName($class)
             $classDirname = implode('\\', array_slice($classDirnameSegments, 0, $index));
 
             return $classDirname.'\\Policies\\'.class_basename($class).'Policy';
+        })->when(str_contains($classDirname, '\\Models\\'), function ($collection) use ($class, $classDirname) {
+            return $collection->concat([str_replace('\\Models\\', '\\Policies\\', $classDirname).'\\'.class_basename($class).'Policy'])
+                ->concat([str_replace('\\Models\\', '\\Models\\Policies\\', $classDirname).'\\'.class_basename($class).'Policy']);
         })->reverse()->values()->first(function ($class) {
             return class_exists($class);
         }) ?: [$classDirname.'\\Policies\\'.class_basename($class).'Policy']);