common/pick_address: add {public,cluster}_network_interface option

common/pick_address: add {public,cluster}_network_interface option

Add _interfaces option to constrain the choice of IPs in the network
list to those on interfaces matching the provided list of interface names.
The _interfaces options only work in concert with the _network options,
so you must also specify a list of networks if you want to use a specific
interface, e.g., by specifying a broad network like "::" or "0.0.0.0/0".

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit 95cc790acddb597d6fef2d9e444f0b6e0436f16f)