feat(postgresql): Add support for overwrite-delete-stale (#2220)

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#### Summary

This adds the following:
- Support for delete stale via
https://github.com/cloudquery/plugin-sdk/pull/224
- numerous bugfixes
- much needed tests for the postgresql destination plugin and split to
number of files as it grew alot already.
- report status via normal counts and not via logs so behaviour is
consistent between debug/release and in general log parsing can be quite
fragile.

Co-authored-by: Herman Schaaf <hermanschaaf@gmail.com>