gluebuddy: Add gitlab bot for aurweb-tfstate project

Aurweb wants to use terraform to create VMs in the Hetzner cloud sandbox
project and it must store the terraform state somewhere. The state can
be stored in GitLab[1], but unfortunately the access is not very
granular. So to avoid handing the CI pipeline too much access to the
aurweb project, a new project has been created, to store only the
terraform state, and an associated project access token.

[1] https://docs.gitlab.com/ee/user/infrastructure/iac/terraform_state.html

roles/gluebuddy/defaults/main.yml

@@ -5,3 +5,4 @@ gitlab_bots:
   - project_19796_bot
   - project_10177_bot
   - project_57011_bot_12149c4ff92f18dd46696e89f2f3e703
+  - project_57074_bot_9fec0b36c8d721eefc66f25d8cf9acb2