find namespace by uuid

[caroav]

In the initiators, e.g. in linux, it is not easy to correlate between the block device and the nsid that we have in the gw. One way to do it is for example:

1. run cat /sys/block/nvme1n2/nguid ===> and get the nguid
2. Then list the namespaces in the gw, and look for a ns with this uuid.

An easier way would be to provide a cli that will find information about a namespace by uuid. E.g. "namespace find -uuid X" - it should look in all subsystems, and return the namespace properties (subsystem, ana grp, ...)