Remove DEBUG-level logging from actions in docker

In elastic#51459 DEBUG-level logging was removed from the default log4j
configuration. However, our docker build has its own log4j configuration
which was missed in that change. This commit removes the same from the
docker log4j configuration.

relates elastic#51459
relates elastic#51198

distribution/docker/src/docker/config/log4j2.properties

@@ -1,9 +1,5 @@
 status = error
 
-# log action execution errors for easier debugging
-logger.action.name = org.elasticsearch.action
-logger.action.level = debug
-
 appender.rolling.type = Console
 appender.rolling.name = rolling
 appender.rolling.layout.type = ECSJsonLayout