Davud Safarov

Results 2 issues of Davud Safarov

- migration update: deployment_environments -> release_environments - Storage Role Interface name refactor: DeploymentEnvironments -> ReleaseEnvironments - move Environment related entity + storage contracts under the release domain

While deleting an Environment or a Flag, either user should get a warning about existing ReleaseRollouts associated with them, or associated ReleaseRollouts should also be deleted