[dataset] add support for Wake-up channel #478

Job	Run time
backbone-router	14m 24s
BR (mDNSResponder, TREL=0)	31m 44s
BR (mDNSResponder, TREL=1)	32m 16s
BR MATN (mDNSResponder, TREL=0)	19m 45s
BR LowPower (mDNSResponder, TREL=0)	9m 30s
BR nat64 (mDNSResponder, TREL=0)	24m 39s
BR (avahi, TREL=0)	31m 58s
BR (avahi, TREL=1)	31m 45s
BR core-firewall (avahi, TREL=0)	31m 54s
upload-coverage	52s
	3h 48m 47s

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