`gitlab_deploy_key`: change ID to support passthrough importer
The gitlab_deploy_key
resource currently uses the ID format: <deploy-key-id>
.
This is not enough to use the passthrough importer, because the project
is missing.
The goal is to:
- implement an id state migration to
<project>:<deploy-key-id>
- change from custom to passthrough importer
Edited by Timo Furrer