cli: fix --amount flag in static in and withdraw #2650

Job	Run time
RPC compilation check	1m 33s
build and lint code	4m 47s
SQL compilation check	11s
go mod check	21m 36s
verify that auto-generated documentation is up-to-date	38s
run unit tests	18m 50s
go mod check	11m 40s
RPC compilation check	1m 33s
run unit tests	18m 50s
SQL compilation check	11s
build and lint code	4m 47s
verify that auto-generated documentation is up-to-date	38s
	1h 25m 14s

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