Move get_executor_factory into the package

[tkilias]

Background

We recognized that the function get_executor_factory might be needed by users of the itde to access the OS of the db container. Currently, the function is part of the test utils, which are not available in the package.

integration-test-docker-environment/test/integration/helpers.py

Line 40 in cbceeed

def get_executor_factory(

Acceptance

• Improve implementation get_executor_factory
• add get_executor_factory to the package