Create manual workflow action to trigger integration tests

[raminqaf]

We should set up a manual workflow that:

1. creates a namespace kpops-it-infra (containing Streamzi, Kafka REST, Kafka connect)
2. creates a namespacekpops-it-<branch> for deploying the pipeline.
3. runs the pytest integration test(s)
4. cleans (delete namespace) created resouces