Use python version to set DEFAULT_PIP_ANSIBLE

Instead of assuming the python version based on the distro, we
check the python version. (Check borrowed from bifrost-cli)

This patch defaults to the newer ansible version, and if python
is old, we override it with the old ansible package.

This lets us install on the RHELatives like Alma and Rocky, which
the current check is preventing.

Change-Id: I47413eab8c5132ab3201b4c7197ec15c17d18e12

Author: eb4x

scripts/env-setup.sh

@@ -5,11 +5,10 @@ set -euo pipefail
 . $(dirname $0)/install-deps.sh
 # NOTE(pas-ha) the above exports some useful variables like
 # $PYTHON , $PIP and $VENV depending on venv install or not
-source /etc/os-release
-if [[ $ID == "centos" ]] || [[ $VERSION_CODENAME == "bullseye" ]]; then
+
+DEFAULT_PIP_ANSIBLE='>=9,<10'
+if ! python3 -c "import sys; assert sys.version_info >= (3, 10)" 2> /dev/null; then
     DEFAULT_PIP_ANSIBLE='>=8,<9'
-elif [[ $ID == "ubuntu" ]] || [[ $VERSION_CODENAME == "bookworm" ]] ; then
-    DEFAULT_PIP_ANSIBLE='>=9,<10'
 fi
 
 ANSIBLE_COLLECTIONS_REQ=${ANSIBLE_COLLECTIONS_REQ:-$(dirname $0)/../ansible-collections-requirements.yml}