install: added option to skip python system packages for setup.sh

setup.sh

@@ -1,20 +1,23 @@
 #!/bin/bash
 
-# install pre-reqs using yum/apt
 PYTHON="${PYTHON:=python3}"
 PYTHON_DEP="${PYTHON_DEP:=python3}"
-if command -v apt &> /dev/null
-then
+
+# install pre-reqs using yum/apt
+if [ -z "${NO_PYTHON}" ]; then
+  if command -v apt &> /dev/null
+  then
     echo "setup to install CORE using apt"
     sudo apt install -y ${PYTHON_DEP}-pip ${PYTHON_DEP}-venv
-elif command -v yum &> /dev/null
-then
+  elif command -v yum &> /dev/null
+  then
     echo "setup to install CORE using yum"
     sudo yum install -y ${PYTHON_DEP}-pip
-else
+  else
     echo "apt/yum was not found"
     echo "install python3, pip, venv, pipx, and invoke to run the automated install"
     exit 1
+  fi
 fi
 
 # install tooling for invoke based installation