Integration for GitOps-based Deployment Tools (e.g. ArgoCD/Flux)

To be able to use GitOps tools in combination with keptn, the main goal of this project is to find a proper way how the tools could interact with keptn and to build an integration for such tools. Deployment tools can be integrated via the helm service or via the job-executor service. Currently, there’s no way to integrate GitOps Tools in Keptn. Provide a way such that it could be integrated into keptn return deployment states after the state has been synced. This project would be done in collaboration with flux and keptn maintainers.