Adding logging configuration and default to the rest of the mautrixes that don't have them

roles/matrix-bridge-mautrix-googlechat/defaults/main.yml

@@ -78,6 +78,9 @@ matrix_mautrix_googlechat_login_shared_secret: ''
 
 matrix_mautrix_googlechat_appservice_bot_username: googlechatbot
 
+# Specifies the default log level for all bridge loggers.
+matrix_mautrix_googlechat_logging_level: WARNING
+
 # Default configuration template which covers the generic use case.
 # You can customize it by controlling the various variables inside it.
 #