CLN API deprecation causes amount issue with swap-outs

[grubles]

CLN at 85992e6e48a6131afee9b24d8b8f99ecd268d73e
PeerSwap at 19aaf19

When initiating a swap-out while running CLN with allow-deprecated-apis=false, the amount check is off by 1000.

$ lightning-cli peerswap-swap-out 140490x1x0 100000000 lbtc
{
   "code": -1,
   "message": "swap amount is 100000000000: need to enable option '--large-channels' to swap amounts larger than 2^32 msat"
}

[grubles]

From the LND side of the channel:

$ ./builds/peerswap/out/pscli swapin --channel_id 154470388586315776 --sat_amt 50000000 --asset lbtc                                                                      
2023/06/13 15:25:56 rpc error: code = Unknown desc = from the CLN peer: swap amount is 50000000000: need to enable option '--large-channels' to swap amounts larger than 2^32 msat