feat: enable channels generator for openapi #617

Job	Run time
Prepare for runtime testing	1m 22s
Runtime Testing TypeScript - NATS	45s
Runtime Testing TypeScript - MQTT	42s
Runtime Testing TypeScript - EventSource	43s
Runtime Testing TypeScript - Kafka	1m 18s
Runtime Testing TypeScript - AMQP	52s
Runtime Testing TypeScript - Regular Tests	38s
Runtime Testing TypeScript - HTTP	51s
	7m 11s

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