Install symlinks from bare programs to python3 versions

Add the python-is-python3 package to the list of installed ones. This
includes unversioned symlinks point to Python 3.x binaries: "python"
will be a symbolic link to "python3", "pydoc" to "pydoc3" and so on,
for the sake of convenience.

Author: aperezdc

images/wkdev_sdk/required_system_packages/01-base.lst

@@ -13,6 +13,9 @@ wireplumber
 # General utilities
 apt-file aptly atop at-spi2-core bind9-dnsutils emacs git htop iotop iputils-ping kmod less libportal-dev libportal-gtk4-dev libxcb-cursor-dev locate man-db nano openssh-client python3-virtualenv strace sudo zip unzip vim-gtk3 wget
 
+# Make python a symbolic link to python3 (and related binaries)
+python-is-python3
+
 # Multimedia
 libx264-dev
 libx265-dev