BUG/MEDIUM: runtime: ensure heredoc payloads have a blank-line termin… #1219

Job	Run time
generate-specification	1m 1s
generate-models	1m 43s
HAProxy check commit message	-1s
lint-spec	-1s
go mod tidy	-1s
license-check	-1s
Build	-1s
golangci-lint	-1s
Tests	0s
Test equal	0s
e2e on HAProxy	0s
	2m 38s

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