chore: fix psalm error on 4.7 (codeigniter4#9590)

Author: paulbalandan

psalm_autoload.php

@@ -10,10 +10,13 @@
     'tests/system/Config/fixtures',
 ];
 $excludeDirs = [
-    'tests/_support/Config',
     'tests/_support/View/Cells',
     'tests/_support/View/Views',
 ];
+$excludeFiles = [
+    'tests/_support/Config/Filters.php',
+    'tests/_support/Config/Routes.php',
+];
 
 foreach ($directories as $directory) {
     $iterator = new RecursiveIteratorIterator(
@@ -38,6 +41,10 @@
             continue;
         }
 
+        if (in_array($file->getPathname(), $excludeFiles, true)) {
+            continue;
+        }
+
         require_once $file->getPathname();
     }
 }