Move scripts to drupal-runtime

Merge only after drupal-runtime!22 (merged)

scripts/check-if-installed.sh

-#!/bin/sh
-set -exu
-
-# Change working directory to the drupal code
-cd /app
-
-# Check if Drupal site is installed
-echo "Checking if Drupal site is installed"
-drush status bootstrap | grep -q Successful
-
-# Make sure we get a successful response
-  if [$? -ne 0]; then
-    echo "Drupal is not installed" >&2
-    exit 1
-  fi
-  exit 0