Querying status via openapi may be blocked when pd fails

[CharlesCheung96]

What did you do?

When network isolation occurs between pd nodes and cdc nodes, run curl -X GET http://127.0.0.1:8300/status, and the terminal is stuck.

What did you expect to see?

> curl -X GET http://127.0.0.1:8300/status                                                                          
{
 "version": "v5.4.0",
 "git_hash": "14db59be99371a0ef996708fa2867e73b2d7b8af",
 "id": "12f02f4c-59c2-4e73-8f9c-9db516fad91c",
 "pid": 8156,
 "is_owner": true
}

What did you see instead?

There is no return message from the terminal

Versions of the cluster

TiCDC version (execute cdc version):

v5.4.0
14db59be99371a0ef996708fa2867e73b2d7b8af

[amyangfei]

Please confirm the affected versions @CharlesCheung96