[v9.4.x] CI: Add GPG keys to rgm, don't clone RGM just use the docker image (#71231)

* CI: Add rgm to drone (#66991)

* add drone stub that build grafana using 'grafana/build' (dagger)

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Co-authored-by: Ricky Whitaker <ricky.whitaker@grafana.com>
(cherry picked from commit 768efe9748)

* Add dagger token to rgm builds (#68651)

(cherry picked from commit a870b227db)

* CI: Add GPG keys to rgm, don't clone RGM just use the docker image (#71143)

* Add GPG keys to rgm, dont' clone RGM just use the docker image

(cherry picked from commit d5a4c81fa1)

scripts/drone/events/release.star

@@ -798,7 +798,7 @@ def verify_release_pipeline(
             "apt-get update && apt-get install -yq gettext",
             "printenv GCP_KEY | base64 -d > /tmp/key.json",
             "gcloud auth activate-service-account --key-file=/tmp/key.json",
-            "./scripts/list-release-artifacts.sh {} | xargs -n1 gsutil stat".format(version),
+            "./scripts/list-release-artifacts.sh {} | xargs -n1 gsutil stat | grep \"No URLs matched\"".format(version),
         ],
     }
     return pipeline(