BUG/MINOR: remove required for redir_option for http_request_rule #530

Job	Run time
generate-models	1m 10s
generate-specification	47s
HAProxy check commit message	0s
lint-spec	9s
Build	27s
go mod tidy	10s
golangci-lint	1m 2s
Tests	37s
e2e on HAProxy (2.1)	42s
e2e on HAProxy (2.2)	37s
e2e on HAProxy (2.3)	39s
e2e on HAProxy (2.4)	40s
e2e on HAProxy (2.5)	44s
e2e on HAProxy (2.6)	40s
e2e on HAProxy (2.7)	37s
e2e on HAProxy (2.8)	41s
	9m 42s

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