[tcat] fix: use normalize_uuid_str() on BBTC_SERVICE_UUID #31

Job	Run time
Examples	2m 44s
Unittests	3m 19s
Stress network-forming	23m 26s
Stress commissioning	14m 57s
Stress connectivity	16m 47s
Stress network-latency	3m 0s
Stress multicast-performance	2m 40s
Stress otns-performance	2m 59s
upload-coverage	16s
	1h 10m 8s

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