MINOR: improve HAProxy runtime version checks #1202

Job	Run time
generate-specification	1m 6s
generate-models	1m 34s
HAProxy check commit message	0s
license-check	0s
lint-spec	0s
golangci-lint	0s
Build	0s
go mod tidy	0s
Tests	-1s
Test equal	-1s
e2e on HAProxy	-1s
	2m 37s

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