tappsbt: add AltLeaf support to vPacket #3370

Job	Run time
Sqlc check	46s
RPC check	1m 10s
Compilation check	1m 44s
cross compilation	11m 54s
Docker build check	3m 36s
Format check	20s
migration version check	16s
go mod check	20s
sample configuration check	46s
test vector check	55s
run unit tests (unit-race)	7m 28s
run itests	10m 38s
run itests postgres	18m 54s
run unit tests (unit-cover)	4m 14s
run unit tests (unit dbbackend=postgres)	5m 28s
run LiT tests	12m 47s
Lint check	2m 58s
finish	4s
	1h 24m 18s

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