https://storyboard.openstack.org/#!/story/2008290 added support
for NVMe-native storage cleaning, greatly improving storage clean
times on NVMe-based nodes as well as reducing device wear.
This is a follow up change which aims to make further improvements
to cleaning efficiency in mixed NVMe-HDD environments. This is
achieved by combining NVMe-native cleaning methods on NVMe devices
with traditional metadata clean on non-NVMe devices.
Story: 2009264
Task: 43498
Change-Id: I445d8f4aaa6cd191d2e540032aed3148fdbff341
c5f7f18bcb