graylog does not capture `log_level` in `log_service:master\-simcore_master_traefik` services

[pcrespov]

log format of traefik cannot be captured by graylog

For instance, traefik writes

time="2023-07-27T09:40:26Z" level=warning msg="Health check failed, removing from server list. Backend: \"master-simcore_webserver@docker\" URL: \"http://10.15.7.233:8080\" Weight: 1 Reason: HTTP request failed: Get \"http://11.2.3.:1234/v0/\": net/http: request canceled (Client.Timeout exceeded while awaiting headers)"

The message should be parsed and standard info should be captured such as

log_level="warning"
log_msg="msg"
...

[YuryHrytsuk]

Traefik logs are parsed. I tested it locally and on Master