fix: only prepend scheme to host when necessary (#34017)

In cases where $options['scheme'] is set, but $options['host'] already has the scheme prepended, the resulting host will be scheme://scheme://host

src/Illuminate/Redis/Connectors/PhpRedisConnector.php

@@ -7,6 +7,7 @@
 use Illuminate\Redis\Connections\PhpRedisConnection;
 use Illuminate\Support\Arr;
 use Illuminate\Support\Facades\Redis as RedisFacade;
+use Illuminate\Support\Str;
 use LogicException;
 use Redis;
 use RedisCluster;
@@ -175,7 +176,7 @@ protected function createRedisClusterInstance(array $servers, array $options)
     protected function formatHost(array $options)
     {
         if (isset($options['scheme'])) {
-            return "{$options['scheme']}://{$options['host']}";
+            return Str::start($options['host'], "{$options['scheme']}://");
         }
 
         return $options['host'];