Add CI_ENVIRONMENT_ACTION to deployment webhook event
Release notes
In effort to prepare for Gitlab-CD's evolution, deployment webhooks now include the environment "action" state.
Problem to solve
Problem Statement: Deployment webhooks are homogenous across heterogenous deployment life cycle statuses.
Environment action creates a distinction at the deployment life cycle with the context of the environment name.
User experience goal
Proposal
Add action:
to the current deployment webhook struct.