KC: Add options to change log levels for Kafka Connect

[yeikel]

Issue submitter TODO list

• I've searched for an already existing issues here
• I'm running a supported version of the application which is listed here and the feature is not present there

Is your proposal related to a problem?

It is often necessary to change the log levels of Kafka connect at runtime during development and debugging. Currently, I need to multi task between the UI and the Kafka Connect REST API as this feature is not exposed in the UI

Describe the feature you're interested in

Expose UI elements to access the different endpoints that the API exposes that can be used to adjust the log levels.

Example features include :

• Check log levels
• Get the log level for a specific logger and/or connector
• Change the log level for a specific logger and/or connector

Describe alternatives you've considered

The only option I am aware of is to call {connect}/admin/loggers/{logger name} manually

Version you're running

c8a8759

Additional context

From provectus/kafka-ui#4349

See https://cwiki.apache.org/confluence/display/KAFKA/KIP-495:+Dynamically+Adjust+Log+Levels+in+Connect

[Haarolean]

Looks useful, we'd need an UI solution first I guess