ubuntu_setup.sh: add option to continue on unsupported os

tools/ubuntu_setup.sh

@@ -104,7 +104,12 @@ if [ -f "/etc/os-release" ]; then
       ;;
     *)
       echo "$ID $VERSION_ID is unsupported. This setup script is written for Ubuntu 20.04."
-      exit 1
+      read -p "Would you like to attempt installation anyway? " -n 1 -r
+      echo ""
+      if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+        exit 1
+      fi
+      install_ubuntu_lts_requirements
   esac
 else
   echo "No /etc/os-release in the system"