Update the CLI section
Update the CLI section

Removes the "ironic" CLI subsection since we no longer
support that.

Adds an "openstacksdk" subsection since we need to make
sure that the sdk provides support for any new features
we add in our REST API.

Change-Id: Ib3608222e2ac512e1fb8d4d032f39ea83ad0c2a5

openstack/ironic-specs