feat(storage/nvme): add cli for backend nvme path

[artek-koltun]

Exemplary cmds to connect to a remote NVMe/TCP controller:

# Connect to remote NVMe/TCP controller
nvmf0=$(go run . storage create backend nvme controller --id nvmef0 --multipath failover)
path0=$(go run . storage create backend nvme path tcp --controller "$nvmf0" --id path0 --ip 127.0.0.1 --port 4420 --nqn nqn.2019-06.io.spdk:0)
go run . storage delete backend nvme path --name $path0
go run . storage delete backend nvme controller --name $nvmf0

# Connect to a PCIe NVMe controller
nvme0=$(go run . storage create backend nvme controller --id nvmee0 --multipath disable)
path0=$(go run . storage create backend nvme path pcie --controller "$nvme0" --id path0 --bdf "0000:65:00.0")
go run . storage delete backend nvme path --name $path0
go run . storage delete backend nvme controller --name $nvme0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0ba322a) 67.64% compared to head (368fc65) 69.27%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #433      +/-   ##
==========================================
+ Coverage   67.64%   69.27%   +1.62%     
==========================================
  Files          17       18       +1     
  Lines        1323     1393      +70     
==========================================
+ Hits          895      965      +70     
  Misses        395      395              
  Partials       33       33              

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[sandersms]

LGTM