google_oidc_plugin also needed on FIPS steps (#50997)

Author: ebeahan

.buildkite/packaging.pipeline.yml

@@ -282,6 +282,7 @@ steps:
         artifact_paths:
           - build/distributions/**/*
         plugins:
+          - *google_oidc_plugin
           - *dockerhub_login_plugin
           - *docker_elastic_login_plugin
 
@@ -471,6 +472,7 @@ steps:
         artifact_paths:
           - build/distributions/**/*
         plugins:
+          - *google_oidc_plugin
           - *dockerhub_login_plugin
           - *docker_elastic_login_plugin