Discovery Service does not support SENTINAL REPLICAS

[tishun]

Bug Report

With the introduction of #2144 discovery service connections no longer work as the Discovery service does not support the SENTINEL REPLICAS command

Current Behavior

Connection fails before bing established, because the SentinelTopologyProvider attempts to execute SENTINEL REPLICAS

Stack trace

Caused by: io.lettuce.core.RedisCommandExecutionException: ERR unknown command
	at io.lettuce.core.internal.ExceptionFactory.createExecutionException(ExceptionFactory.java:147)
	at io.lettuce.core.internal.ExceptionFactory.createExecutionException(ExceptionFactory.java:116)
	... 21 common frames omitted```

</details>

#### Input Code
        
<details>
<summary>Input Code</summary>

```java
RedisURI sentinelUri = RedisURI.Builder
                .sentinel(ENV0_SENTINEL, 8001, MASTER_ID)
                .withAuthentication(SENTINEL_USERNAME, SENTNEL_PASSWORD)
                .build();
        RedisClient client = RedisClient.create();

        StatefulRedisMasterReplicaConnection<String, String> connection = MasterReplica.connect(
                client,
                StringCodec.UTF8,
                sentinelUri);

        connection.setReadFrom(ReadFrom.REPLICA);

        connection.sync().get("key");

        connection.close();
        client.shutdown();

Expected behavior/code

Establish connection successfully.

Environment

• Lettuce version(s): 6.2.x or later
• Redis version: any