Namespace deletions configured via the deletions manifest don't actually get deleted

Namespace deletions configured via the deletions manifest don't actually get deleted: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). We rely on CLM's deletions manifest to clean up resources that are no longer needed in our clusters. This works fine for most kinds, but…