tappsbt: add AltLeaf support to vPacket #3336

Job	Run time
cross compilation	11m 56s
Docker build check	3m 47s
Format check	22s
Compilation check	48s
run itests	10m 47s
run itests postgres	18m 47s
Lint check	2m 35s
migration version check	10s
go mod check	28s
RPC check	1m 21s
run LiT tests	12m 50s
sample configuration check	46s
Sqlc check	2m 49s
test vector check	56s
run unit tests (unit-race)	7m 27s
run unit tests (unit-cover)	4m 16s
run unit tests (unit dbbackend=postgres)	5m 30s
finish	5s
	1h 25m 40s

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