On Debian, package python3-venv needs to be installed to un-sabotage python3.

Needed in #33812.

CC: @dimpase

Component: packages: standard

Author: Matthias Koeppe

Branch/Commit: 52dca7d

Reviewer: Tobias Diez, Dima Pasechnik

Issue created by migration from https://trac.sagemath.org/ticket/33822