CI: make idauth jobs independent from UoW jobs (needs keyword)

https://docs.gitlab.com/ee/ci/yaml/index.html#needs makes it possible that the
part of the pipeline that provisions GWDG Identity Authority is independent from
all other instances.

.gitlab-ci.yml

@@ -272,6 +272,7 @@ push-idauth:
         SSH_UPLOAD_DIR: /usr/local/snet-asclepios-deployment
 configure-idauth:
     extends: .configure_gwdg_template
+    needs: ["push-idauth"]
     variables:
         SSH_HOST: registration-authority.snet-apps.com
         SSH_HOST_KEY: registration-authority.snet-apps.com ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIN4JjWaU/e5NX4SdYHASM+MF0JN45zqEQIKakjPTA91H
@@ -279,6 +280,7 @@ configure-idauth:
         SSH_UPLOAD_DIR: /usr/local/snet-asclepios-deployment
 start-idauth:
     extends: .start-gwdg-template
+    needs: ["configure-idauth"]
     variables:
         SSH_HOST: registration-authority.snet-apps.com
         SSH_HOST_KEY: registration-authority.snet-apps.com ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIN4JjWaU/e5NX4SdYHASM+MF0JN45zqEQIKakjPTA91H
@@ -286,6 +288,7 @@ start-idauth:
         SSH_UPLOAD_DIR: /usr/local/snet-asclepios-deployment
 test-idauth:
     extends: .test-gwdg-template
+    needs: ["start-idauth"]
     variables:
         SSH_HOST: registration-authority.snet-apps.com
         SSH_HOST_KEY: registration-authority.snet-apps.com ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIN4JjWaU/e5NX4SdYHASM+MF0JN45zqEQIKakjPTA91H