Improvement: Make task handler configurable in airflow crds

[Maleware]

As of now we addressed an issue of airflow logging with this PR.

However this is not the best possible solution. Ideally we'd like to have a situation like

          logging:
            containers:
              airflow:
                console:
                  level: INFO
                file:
                  level: INFO
                task:
                  level: INFO
                loggers:
                  ROOT:
                    level: INFO

in airflow CRD's, setting the handlers log level.

This comment is a working solution which needs to be implemented comparable to file and console.

[NickLarsenNZ]

Release note

I believe this needs one as it appears to change the semantics of logging.containers.airflow.task.