Remove websocket DEBUG logging

By going from logging DEBUG messages to INFO and above, we shave 95% off the log
size when doing the poly-example. Logging has been proven to be a bottleneck
so this change could actually improve perceived application speed.

Not opting to filter out INFO as well for the moment, meaning we will still log
whenever the connection is closed and reopened (which we don't want to happen
so it makes sense to log it).

src/ert/logging/logger.conf

@@ -44,7 +44,7 @@ handlers:
     (): ert.logging.TimestampedFileHandler
     use_log_dir_from_env: true
   websocketsfile:
-    level: DEBUG
+    level: INFO
     formatter: simple_with_threading
     filename: websockets-log.txt
     (): ert.logging.TimestampedFileHandler