Amount specified in manual `createreverseswap` should be to amount

[kilrau]

Currently:

• boltzcli createswap lbtc 1325264 is "to" amount (invoice)
• boltzcli createreverseswap lbtc 10000 is "from" amount (invoice)?
• boltzcli createchainswap doesn't have this issue, as it's always requiring specifying from/to

To be changed: createreverseswap should be "to" amount