cdc: tidb sink with tls cannot connect with scheme 'mysql://'

[AkiraXie]

What did you do?

open changefeed to tls tidb sink with schema 'mysql://'

What did you expect to see?

no err

What did you see instead?

cannot create changefeed

use 'tidb://' can work

Versions of the cluster

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

(paste TiDB cluster version here)

Upstream TiKV version (execute tikv-server --version):

(paste TiKV version here)

TiCDC version (execute cdc version):

master 
or
v9.0-beta.1

[AkiraXie]

/severity major

[jebter]

introduced pr #12063