Make it possible to dynamically change the log levels in CO

[scholzj]

We should make it possible to dynamically change the log levels in CO. Since it is using Log4j2, that might be easier than with Kafka components.

Would having a config map with a log4j2.proeprties file and enabling auto-reloading the logging config map using https://logging.apache.org/log4j/1.2/faq.html#a3.6 be enough? Or do we need to for example have a REST endpoint which will call something like ((org.apache.logging.log4j.core.LoggerContext) LogManager.getContext(false)).reconfigure().

[sknot-rh]

Implemented in the PR #3328