Move ament setup hook to ament_package and fix using it with buildEnv

distros/ament-cmake-core-setup-hook.sh

@@ -1,21 +0,0 @@
-isAmentPackage() {
-  [ -d "$1/share/ament_index" ]
-}
-
-declare -gA _amentPackagesSeen
-
-_findAmentPackages() {
-  local pkg="$1"
-  # Deduplicate the packages
-  if [ -z "${_amentPackagesSeen["$pkg"]:-}" ] \
-    && isAmentPackage "$pkg" \
-    && [ -n "$(shopt -s nullglob; echo $pkg/share/*/local_setup.sh)" ]
-  then
-    # ROS scripts use unbound variables
-    set +u
-    source "$pkg"/share/*/local_setup.sh
-    set -u
-  fi
-  _amentPackagesSeen["$pkg"]=1
-}
-addEnvHooks "$hostOffset" _findAmentPackages