sweep: allow specified outputs to sweep tx

We'll use this to attach an output for the value reserved for anchor
commitments fee bumping if the user requests a send_all transaction.

sweep/sweeper.go

@@ -1192,8 +1192,8 @@ func (s *UtxoSweeper) sweep(inputs inputSet, feeRate chainfee.SatPerKWeight,
 
 	// Create sweep tx.
 	tx, err := createSweepTx(
-		inputs, s.currentOutputScript, uint32(currentHeight), feeRate,
-		dustLimit(s.relayFeeRate), s.cfg.Signer,
+		inputs, nil, s.currentOutputScript, uint32(currentHeight),
+		feeRate, dustLimit(s.relayFeeRate), s.cfg.Signer,
 	)
 	if err != nil {
 		return fmt.Errorf("create sweep tx: %v", err)
@@ -1487,7 +1487,7 @@ func (s *UtxoSweeper) CreateSweepTx(inputs []input.Input, feePref FeePreference,
 	}
 
 	return createSweepTx(
-		inputs, pkScript, currentBlockHeight, feePerKw,
+		inputs, nil, pkScript, currentBlockHeight, feePerKw,
 		dustLimit(s.relayFeeRate), s.cfg.Signer,
 	)
 }