Check for venv module while installing AI tools

Summary: Check if venv module is found in the python for SAM/MedSAM & Totalsegmentator installation.

Test Plan: NA

Reviewers: kislinsk, floca, O1 MITK Reviewer Group I

Reviewed By: kislinsk, O1 MITK Reviewer Group I

Differential Revision: https://phabricator.mitk.org/D955