OTNS

[nexus] migrate publish meshcop service cert test to nexus (#13186) #2596

Job	Run time
Stress network-latency	5m 44s
Stress connectivity	46m 38s
Unittests	18m 10s
Stress otns-performance	4m 37s
Stress network-forming	21m 14s
Stress multicast-performance	6m 9s
Stress commissioning	19m 54s
Examples	5m 48s
upload-coverage	-1s
	2h 8m 13s

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