Add forfeit address in GetInfo (#326)

* keep track of forfeit transaction funds

* [btc-embedded] use p2wpkh address

* [sdk] fix clients

* use script as argument of BuildForfeitTxs

pkg/client-sdk/wallet/wallet_test.go

@@ -31,6 +31,7 @@ func TestWallet(t *testing.T) {
 		UnilateralExitDelay:        512,
 		Dust:                       1000,
 		BoardingDescriptorTemplate: "tr(0250929b74c1a04954b78b4b6035e97a5e078a5a0f28ec96d547bfee9ace803ac0,{ and(pk(873079a0091c9b16abd1f8c508320b07f0d50144d09ccd792ce9c915dac60465), pk(USER)), and(older(604672), pk(USER)) })",
+		ForfeitAddress:             "bcrt1qzvqj",
 	}
 	tests := []struct {
 		name  string