nvme-cli: Expand --device argument processing

nvme-cli: Expand --device argument processing

The connect-all --device argument was used to specify a specific device
to be used as the discovery controller. The device is typically a
long-lived discovery controller that posted a discovery event.
No attempt was made to ensure the device is who it is supposed to be
before using it.

Revised the code to use the other arguments in the connect-all request
to validate that the device is the entity that was expected. If the
device doesn't match, the cli will look for an existing matching device
in the system (should be a discovery controller due to nqn) with the
same connect parameters and use it.  If one is not found on the system,
a new discovery controller will be created for the connect-all request.

The revision uses new routines to parse the connect arguments given
in the argstr parameter. As a couple of new fieldnames are needed, the
parse routine constants were expanded for them.

The revision uses the new routines to match the specified device vs
it's attributes as well as the search routine that looks for a device
with the connect arguments.

Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>