In support matrix, move Nimble driver entries next to HPE driver
In support matrix, move Nimble driver entries next to HPE driver

This patch is follow up patch to:
https://review.opendev.org/c/openstack/cinder/+/786054
Move nimble driver code to hpe folder

Updated the support matrix

Change-Id: I5e95acfe6c3066e038ca77698baa94807b0fbedb

mahak/cinder,mahak/cinder,openstack/cinder,openstack/cinder