Fix the ReplicaOnly option does not take effect when using NewFailoverClusterClient (#3482)

Signed-off-by: Xiaolong Chen <[email protected]>
Co-authored-by: Nedyalko Dyakov <[email protected]>

Author: cxljs

sentinel.go

@@ -245,6 +245,7 @@ func (opt *FailoverOptions) clusterOptions() *ClusterOptions {
 
 		MaxRedirects: opt.MaxRetries,
 
+		ReadOnly:       opt.ReplicaOnly,
 		RouteByLatency: opt.RouteByLatency,
 		RouteRandomly:  opt.RouteRandomly,