* tests: refactor
refactor tests and consolidate common functionality in integrations.conftest
this enables writing tests more concisely.
demonstrated with postgres and mssql.
will migrate more
* format
* removed helpers
* changed scope of fictures
* changed scope of fixtures
* added profiler test for mssql
* fixed import in data_quality test
* json safe serialization
* format
* set MARS_Connection
* fix(data-quality): empty test suite
do not raise for empty test suite
* format
* dont need to check length in _get_test_cases_from_test_suite
* fix
* added warning if no test cases are found
