feat: add workflow for checking compatibility with postgres and postgis (MAPCO-6391)

[shimoncohen]

This PR adds two workflows in order to allow running a repositories tests against different versions of postgis and node via slash-command to check compatability.

A fix for the reverted PR - #33 #34

Some issues iv'e run into during the creation of the workflows:

• Cannot dynamically collect the output of a matrix - https://github.com/orgs/community/discussions/17245
• When referencing the workflows from other repositories and passing empty input it is passed as an empty string (had to make some workaround) - Reusable workflow input with default string is not used when the calling input passed an empty string. actions/runner#2907 Differentiate between input parameter empty or not present actions/runner#924

[alex131290]

👍