Support query argument redaction in DM logging

[michaelmdeng]

Is your feature request related to a problem?

When DM logs queries, either with debug logging for all queries, or when encountering errors with warning/error logging, it logs the entire text of the query with arguments. This risks logging sensitive data.

For example, many of the log lines in https://github.com/pingcap/tiflow/blob/master/dm/pkg/conn/baseconn.go will log (truncated) full queries and arguments

Describe the feature you'd like

Configuration, similar to tidb log redaction, that will redact sensitive arguments from queries when DM logs them.

Describe alternatives you've considered

Since they are logged at all possible log levels, no alternative but turning off logging entirely.

Teachability, Documentation, Adoption, Migration Strategy

N/A