[sqllogictest] Don't orchestrate the postgres containers with rust / docker

[alamb]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
#4834 adds a way to run sqllogictests using postgres 🦾 (kudos to @melgenek )

However, it currently orchestrates the postgres containers with rust test code which means running these tests requires docker to run the (full) datafusion test suit locally

Describe the solution you'd like

1. Remove testcontainers dependency
2. Allow sqllogictest PG_COMPAT mode to run against an existing postgres database (supply the connection information)

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[alamb]

I am very interested in this task so I am going to try and hack it a bit this morning -- fyi @xudong963 and @melgenek

[alamb]

#5015 is ready for review