tappsbt: add AltLeaf support to vPacket #3356

Job	Run time
Format check	21s
Docker build check	3m 37s
cross compilation	15m 0s
Compilation check	1m 45s
run itests	10m 27s
Lint check	2m 41s
run itests postgres	18m 36s
migration version check	14s
go mod check	24s
RPC check	1m 23s
run LiT tests	12m 40s
sample configuration check	50s
Sqlc check	33s
test vector check	57s
run unit tests (unit-race)	7m 36s
run unit tests (unit-cover)	4m 21s
run unit tests (unit dbbackend=postgres)	5m 30s
finish	2s
	1h 26m 57s

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