Update release procedures to use chatops
Now that chatops can be used to deploy to staging and production, we should update our release templates to use this new solution. Quickly looking through the templates, I see we probably have to make two additions first:
- Being able to warm up packages
- Support for deploying to specific roles, such as the canaries
I'm not sure though if we actually need package warm ups.
Once in place, we should update the templates to use the new chatops commands/options.
I'm creating this issue here since the work will span across multiple projects (https://gitlab.com/gitlab-org/release-tools/issues and https://gitlab.com/gitlab-com/chatops/).
cc @rspeicher @marin