CDC cloud: changefeed state confusing

[ben1009]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do? If possible, provide a recipe for reproducing the error.
   create changefeed with mysql as sink but connection refused

2. What did you expect to see?
   the state should be not normal at least

3. What did you see instead?
   normal
   

4. Versions of the cluster

   • Upstream TiDB cluster version (execute SELECT tidb_version(); in a MySQL client):

     5.0.0
     

   • TiCDC version (execute cdc version):

     Release Version: v5.0.2-63-g9300b05-dirty
     Git Commit Hash: 9300b05ceec2c4811198416a5d21e9f4910deddd
     Git Branch: HEAD
     UTC Build Time: 2021-07-07 07:24:23
     Go Version: go version go1.16.5 darwin/amd64
     Failpoint Build: false
     

[asddongmen]

fixed.