TC-CNET-4.16: Automate

[cecille]

The yaml is actually ok here, but consider whether this test plan can be updated to eliminate the requirement for factory reset. I don't think it's required.

current test: https://github.com/project-chip/connectedhomeip/blob/master/src/app/tests/suites/certification/Test_TC_CNET_4_16.yaml

test plan: https://github.com/CHIP-Specifications/chip-test-plans/blob/master/src/cluster/network_commissioning.adoc