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

• Your code complies with our Coding Style.
• You've updated unit and/or integration tests for your change, where applicable.
• You've updated documentation for your change, where applicable.
  If your change affects other repositories, such as Documentation, Samples and/or MainSite, add linked PRs here.
• There's an open issue for the PR that you are making. If you'd like to propose a new feature or change, please open an issue to discuss the change or find an existing issue.
• You've added required license files and/or file headers (explaining where the code came from with proper attribution), where code is copied from StackOverflow, a blog, or OSS.

[TimHess]

LGTM

[bart-vmware]

For future reference: Documentation/code for the Postgres tile is maintained at https://github.gwd.broadcom.net/TNZ/postgres-tile (non-public link).

[bart-vmware]

Superseded by #1528.