Ship a pre-compiled AppArmor policy to make boot faster (refs: #16138)

config/chroot_local-hooks/99-cache-AppArmor-policy

+#!/bin/sh
+
+set -e
+
+echo "Generate the pre-compiled binary AppArmor policy cache"
+
+apparmor_parser \
+   --write-cache \
+   --skip-kernel-load \
+   --verbose \
+   --add \
+   /etc/apparmor.d