tappsbt: add AltLeaf support to vPacket #3368

Job	Run time
Compilation check	1m 40s
Format check	21s
Docker build check	3m 46s
cross compilation	12m 10s
run itests	10m 30s
run itests postgres	19m 0s
Lint check	2m 42s
migration version check	11s
go mod check	20s
RPC check	1m 18s
run LiT tests	12m 42s
sample configuration check	42s
Sqlc check	28s
test vector check	1m 3s
run unit tests (unit-race)	7m 39s
run unit tests (unit-cover)	4m 11s
run unit tests (unit dbbackend=postgres)	5m 31s
finish	3s
	1h 24m 17s

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