openEuler is the newest open source operating system, which is quite
famous and widely used in China. This patch aims to add the OS support
in kolla-ansible for the host OS.

bp: support-openeuler-os

Depends-On: https://review.opendev.org/c/openstack/ansible-collection-kolla/+/830320

Change-Id: I66dc84f02c324dbc0787ec25d4bd92ada9362e94