CI: Use docker creds from ci/common (#104827)

Use docker creds from ci/common

.drone.yml

@@ -5061,13 +5061,13 @@ name: prerelease_bucket
 ---
 get:
   name: username
-  path: infra/data/ci/grafanaci-docker-hub
+  path: ci/data/common/dockerhub
 kind: secret
 name: docker_username
 ---
 get:
   name: password
-  path: infra/data/ci/grafanaci-docker-hub
+  path: ci/data/common/dockerhub
 kind: secret
 name: docker_password
 ---
@@ -5210,6 +5210,6 @@ kind: secret
 name: gcr_credentials
 ---
 kind: signature
-hmac: 16029e3922ae0a13a31233717aa172c06bf0e6fc8cf01f5148de62147c259ac8
+hmac: 38513409bb4d2834e2140e41a9873c81052683ad8d9c86f3136060c44d099b6f
 
 ...

scripts/drone/vault.star

@@ -55,8 +55,8 @@ def secrets():
         vault_secret(gar_pull_secret, "secret/data/common/gar", ".dockerconfigjson"),
         vault_secret(drone_token, "infra/data/ci/drone", "machine-user-token"),
         vault_secret(prerelease_bucket, "infra/data/ci/grafana/prerelease", "bucket"),
-        vault_secret(docker_username, "infra/data/ci/grafanaci-docker-hub", "username"),
+        vault_secret(docker_username, "ci/data/common/dockerhub", "username"),
-        vault_secret(docker_password, "infra/data/ci/grafanaci-docker-hub", "password"),
+        vault_secret(docker_password, "ci/data/common/dockerhub", "password"),
         vault_secret(
             gcp_upload_artifacts_key,
             "infra/data/ci/grafana/releng/artifacts-uploader-service-account",