Avoid Cloud SQL read/write access to delete packages

Created by: incident-io[bot]

Avoid the need to use the read/write Cloud SQL connection to fix the original npm issue https://github.com/sourcegraph/sourcegraph/issues/39684. If there was a site-admin interface for packages then Olaf Geirsson would have used that interface (which has a small blast radius) instead of the read/write Cloud SQL connection (which has a huge blast radius).

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This action was created from Incident 137 by Olaf Geirsson, using incident.io 🔥