chore(docs): use new conf file for OpenAPI version #1193

Job	Run time
console / helm-integration-test-console	11m 35s
backend (artifact-backend) / helm-integration-test	10m 18s
backend (mgmt-backend) / helm-integration-test	9m 28s
backend (model-backend) / helm-integration-test	10m 52s
backend (pipeline-backend) / helm-integration-test	12m 1s
	54m 14s

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