MINOR: configuration: add http-response set-timeout #449

Job	Run time
generate-models	2m 3s
HAProxy check commit message	0s
generate-specification	1m 10s
go mod tidy	6s
lint-spec	7s
golangci-lint	1m 57s
Build	30s
Tests	2m 59s
e2e on HAProxy (2.1)	43s
e2e on HAProxy (2.2)	43s
e2e on HAProxy (2.3)	40s
e2e on HAProxy (2.4)	40s
e2e on HAProxy (2.5)	43s
e2e on HAProxy (2.6)	43s
e2e on HAProxy (2.7)	44s
e2e on HAProxy (2.8)	40s
	14m 28s

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