Multi version ext/pg cron (#1737)w
* feat: pg_cron multi-version with new pattern
* feat: pg_cron using the new multi-version pattern not yet complete
* fix: bring in some function from previous version to test
* chore: move pg_cron extension package to its own directory
* feat: add nixos test for pg_cron extension
* feat: refactor pg_cron to use buildEnv
Fix upgrade nixos tests that was broken.
Move overlays and switch-ext-version script to package.
* feat: refactor pg_net according to previous refactoring
* Refactor postgres extensions tests
Keep the postgres extension tests DRY by extracting shared logic into a shared library.
* chore: format python files using ruff
* chore: rebase on develop and bump version for retsting
* ore: bump version for deploy
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Co-authored-by: Jean-François Roche <[email protected]>
