itest: use explicit chan type negotiation for taproot chan cases

The prior commit removed implicit negotiation, so we'll need to make
sure to use the explicit chan type feature vector when we go to
negotiate.

itest/lnd_revocation_test.go

@@ -250,8 +250,9 @@ func revokedCloseRetributionZeroValueRemoteOutputCase(ht *lntest.HarnessTest,
 	privateChan := commitType == lnrpc.CommitmentType_SIMPLE_TAPROOT
 	chanPoint := ht.OpenChannel(
 		dave, carol, lntest.OpenChannelParams{
-			Amt:     chanAmt,
-			Private: privateChan,
+			CommitmentType: commitType,
+			Amt:            chanAmt,
+			Private:        privateChan,
 		},
 	)
 
@@ -436,9 +437,10 @@ func revokedCloseRetributionRemoteHodlCase(ht *lntest.HarnessTest,
 	privateChan := commitType == lnrpc.CommitmentType_SIMPLE_TAPROOT
 	chanPoint := ht.OpenChannel(
 		dave, carol, lntest.OpenChannelParams{
-			Amt:     chanAmt,
-			PushAmt: pushAmt,
-			Private: privateChan,
+			Amt:            chanAmt,
+			PushAmt:        pushAmt,
+			Private:        privateChan,
+			CommitmentType: commitType,
 		},
 	)