[tcat] Add tcat implementaions and bug fix. #584

Job	Run time
backbone-router	14m 23s
BR (mDNSResponder, TREL=0)	32m 38s
BR (mDNSResponder, TREL=1)	33m 4s
BR MATN (mDNSResponder, TREL=0)	19m 59s
BR LowPower (mDNSResponder, TREL=0)	8m 59s
BR internet access (mDNSResponder, TREL=0)	23m 29s
BR (avahi, TREL=0)	35m 39s
BR (avahi, TREL=1)	30m 55s
BR core-firewall (avahi, TREL=0)	32m 4s
upload-coverage	1m 14s
	3h 52m 24s

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