Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

Start a tidb cluster with ipv6
1、pd-server -data-dir=pdata -client-urls="http://[::1]:2379" -peer-urls="http://[::1]:2380"
2、tikv-server --data-dir=pdata --pd="[::1]:2379" --addr="[::1]:20160" --advertise-addr="[::1]:20160" --status-addr="[::1]:20180"
3、tidb-server --path="[::1]:2379" -store=tikv --host="[::1]" -status-host="[::1]" -advertise-address="[::1]"
4、start tiflash with ipv6

2. What did you expect to see? (Required)

tiflash started successfully

3. What did you see instead (Required)

tiflash cannot connect to pd ：
[2022/06/28 19:27:25.993 +08:00] [WARN] [] ["pingcap.pd:failed to get cluster id by :http://[::1]:2379/ retrying"] [thread_id=1]
[2022/06/28 19:27:26.996 +08:00] [ERROR] [] ["pingcap.pd:get member failed: 14: failed to connect to all addresses"] [thread_id=1]

4. What is your TiFlash version? (Required)

v6.1.0