Add Connector support for VMware Postgres TAS tile

[bart-vmware]

Description

Add Connector support for the PostgreSQL TAS tile at https://docs.vmware.com/en/VMware-Postgres-for-VMware-Tanzu-Application-Service/1.0/postgres/index.html.

Update (dec 2023): reverted back to draft, due to potential upcoming changes in the postgres vmware tile.

The problem: High Availability mode does not work, because the tile uses bosh for load-balancing. Despite credentials:hosts being an array, it will currently always contain a single entry (to bosh). A subsequent DNS resolve results in multiple IPs, which Npgsql does not support.

Quality checklist

• [x] Your code complies with our Coding Style.
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