PostgreSQL fails to start for Auto Deploy App if Binary Auth is enabled for GCP

Problem to solve

If we enable Binary Auth for GCP cluster and try to run Auto Deploy App there, postgreSQL will fail to start since policy doesn't permit it.

Proposed solution

1. Modify policy to include postgresql:

   admissionWhitelistPatterns:
   - namePattern: docker.io/postgres:latest

2. Update Postgresql chart

@nolith:

the problem with postgres is that we are using an outdated chart an updated version should use docker.io according to upstream

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