Some tests are in the 'tests' package where package private functions cannot be tested

[jirifilip]

Describe the bug

Some of the tests are located in the za.co.absa.pramen.{core,runner,extras}.tests package whereas some of them are located in za.co.absa.pramen.{core,runner,extras}. In the za.co.absa.pramen.core.{core,runner,extras}.tests, package private functions cannot be tested because the name of the test package is different than the name of the package of the class under test.

Expected behavior

The tests should be under za.co.absa.pramen.{core,runner,extras} package. The package private functions can be then tested.

Context

Pramen/pramen-py version: 1.2.2