* The goal of this change is to enable the ability to configure only the
VFs that are configured through the charm and not fallback to the
blanket configuration.
* This python version of the script brings unit-tests that fully covers
it.
* Move the the template files to `files` and modify `neutron_ovs_utils`
accordingly.
Closes-Bug: 1832379
Depends-On: https://review.opendev.org/#/c/664837/
Change-Id: I7ad1ebc16883bda23cbad89a852e7e8f88f49c49
d02fad482d