debian: set journald log level to INFO (#29149)

DEBUG logs must go to a local file now.

debian/debian_config_common.py

@@ -192,6 +192,7 @@ if os.path.exists('/run/systemd/journal/socket'):
         warnings.warn('journald will not be used directly, please install python-systemd')
     else:
         LOGGING['handlers']['journald'] = {
+            'level': 'INFO',
             'class': 'hobo.journal.JournalHandler',
             'filters': ['request_context'],
             'formatter': 'syslog',