Add websockets debug level logs

The websockets logs can be helpful in debugging runs - they are wordy,
even at an INFO level though. We set the level to DEBUG so we can get
any and all information we need when necessary, and move them to their
own file so as not to clutter other log files.

src/ert/logging/logger.conf

@@ -41,6 +41,12 @@ handlers:
     filename: ee-log.txt
     (): ert.logging.TimestampedFileHandler
     use_log_dir_from_env: true
+  websocketsfile:
+    level: DEBUG
+    formatter: simple_with_threading
+    filename: websockets-log.txt
+    (): ert.logging.TimestampedFileHandler
+    use_log_dir_from_env: true
   migration_handler:
     level: DEBUG
     formatter: simple
@@ -100,8 +106,8 @@ loggers:
   subscript:
     level: INFO
   websockets:
-    level: WARN
-    handlers: [eefile]
+    level: DEBUG
+    handlers: [websocketsfile]
     propagate: no
   ert.job_queue:
     level: DEBUG