htlcswitch+routing: add htlc blob to ShouldHandleTraffic

Whether we should let the aux bandwidth manager decide what the
bandwidth of a channel is should also depend on whether the HTLC is a
custom HTLC, not just the channel.

htlcswitch/link.go

@@ -3484,7 +3484,7 @@ func (l *channelLink) AuxBandwidth(amount lnwire.MilliSatoshi,
 	ts AuxTrafficShaper) fn.Result[OptionalBandwidth] {
 
 	fundingBlob := l.FundingCustomBlob()
-	shouldHandle, err := ts.ShouldHandleTraffic(cid, fundingBlob)
+	shouldHandle, err := ts.ShouldHandleTraffic(cid, fundingBlob, htlcBlob)
 	if err != nil {
 		return fn.Err[OptionalBandwidth](fmt.Errorf("traffic shaper "+
 			"failed to decide whether to handle traffic: %w", err))