I don't have any log_group_name in my code. Checking git blame, I could even say: 6 years ago, that object was introduced, with "log_destination", already compliant ...
{ "_time": 1756320965.344, "message": "W0903 18:05:03.633758 13 logging.go:55] [core] [Channel #3891283 SubChannel #3891284]grpc: addrConn.createTransport failed to ...