BUG/MINOR: groups: flat response for single item #518

Job	Run time
generate-models	1m 6s
generate-specification	50s
HAProxy check commit message	0s
license-check	22s
lint-spec	6s
golangci-lint	47s
Build	26s
go mod tidy	11s
Tests	2m 42s
e2e on HAProxy (2.1)	41s
e2e on HAProxy (2.2)	48s
e2e on HAProxy (2.3)	41s
e2e on HAProxy (2.4)	45s
e2e on HAProxy (2.5)	42s
e2e on HAProxy (2.6)	39s
e2e on HAProxy (2.7)	46s
e2e on HAProxy (2.8)	42s
	12m 14s

Provide feedback