Fixed str_replace for PHP 8 + platinum in Utility::getClient()

Author: ezimuel

tests/Elasticsearch/Tests/Utility.php

@@ -56,7 +56,7 @@ public static function getClient(): Client
                 ]
             ]
         ]);
-        if (getenv('TEST_SUITE') === 'xpack') {
+        if (getenv('TEST_SUITE') === 'platinum') {
             $clientBuilder->setSSLVerification(false);
         }
         return $clientBuilder->build();

util/YamlTests.php

@@ -311,7 +311,7 @@ public static function render(string $fileName, array $params = []): string
             } elseif ($value instanceof \stdClass) {
                 $value = 'new \stdClass';
             }
-            $output = str_replace($name, $value, $output);
+            $output = str_replace($name, (string) $value, $output);
         }
         return $output;
     }