[v9.4.x] Security: Authenticate to GCR for trivy scans (#73926)

Security: Authenticate to GCR for trivy scans (#72658)

* Authenticate to GCR for trivy scans

# Conflicts:
#	.drone.yml

* verify-starlark

* Change secret

# Conflicts:
#	.drone.yml

(cherry picked from commit e100fc927e)

# Conflicts:
#	.drone.yml
#	scripts/drone/vault.star

scripts/drone/vault.star

@@ -112,11 +112,6 @@ def secrets():
             "infra/data/ci/grafana-release-eng/enterprise2",
             "cdn_path",
         ),
-        vault_secret(
-            "enterprise2_security_prefix",
-            "infra/data/ci/grafana-release-eng/enterprise2",
-            "security_prefix",
-        ),
         vault_secret(
             rgm_gcp_key_base64,
             "infra/data/ci/grafana-release-eng/rgm",
@@ -168,4 +163,9 @@ def secrets():
             "infra/data/ci/github/grafanabot",
             "pat",
         ),
+        vault_secret(
+            "gcr_credentials",
+            "secret/data/common/gcr",
+            "service-account",
+        ),
     ]