* Add support for PostgreSQL 16
This requires Alpine 3.19
* Drop support for PostgreSQL 11
Version 11 has reached end-of-life (EOL)
https://www.postgresql.org/support/versioning/
* Install aws-cli via apk instead of pip3
This removes python3 and py3-pip as explicit dependencies.
Python is still installed as a derived dependency.
This fixes building on Alpine 3.19