run-tests.php: Use PHP_SHLIB_SUFFIX (#21301)

Instead of hardcoding the file extensions for shared PHP extensions
(which in most cases are '.so', or '.dll'), this uses file extension for
the current PHP build as it was defined during the configure/build
phase. There can be systems where some other file extension is used for
shared modules.

Author: petk

run-tests.php

@@ -859,7 +859,7 @@ function write_information(array $user_tests, $phpdbg): void
         $exts = get_loaded_extensions();
         $ext_dir = ini_get('extension_dir');
         foreach (scandir($ext_dir) as $file) {
-            if (preg_match('/^(?:php_)?([_a-zA-Z0-9]+)\.(?:so|dll)$/', $file, $matches)) {
+            if (preg_match('/^(?:php_)?([_a-zA-Z0-9]+)\.(?:' . PHP_SHLIB_SUFFIX . ')$/', $file, $matches)) {
                 if (!extension_loaded($matches[1])) {
                     $exts[] = $matches[1];
                 }