tappsbt: add AltLeaf support to vPacket #3355

Job	Run time
cross compilation	12m 7s
Compilation check	1m 47s
Format check	21s
Docker build check	3m 37s
run itests	10m 36s
run itests postgres	18m 54s
Lint check	2m 35s
migration version check	10s
go mod check	22s
RPC check	1m 10s
run LiT tests	12m 36s
sample configuration check	42s
Sqlc check	29s
test vector check	1m 2s
run unit tests (unit-race)	7m 30s
run unit tests (unit-cover)	4m 15s
run unit tests (unit dbbackend=postgres)	5m 22s
finish	3s
	1h 23m 38s

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