This patch adds support for API microversion 3.16, which allows us to
pass --cluster optional argument to migration and manage operations.
For this, a new type of CLI argument is added, the mutually exclusive
arguments that can be used similarly to the utils.arg decorator, but
with utils.exclusive_arg decorator.
Implements: blueprint cinder-volume-active-active-support
Change-Id: If004715b9887d2a0f9fc630b44d6e11a4a8b778d