multi: extend InvoiceDB methods with a context argument (#8066)

* multi: extend InvoiceDB methods with a context argument

This commit adds a context to InvoiceDB's methods. Along this refactor
we also extend InvoiceRegistry methods with contexts where it makes
sense. This change is essential to be able to provide kvdb and sqldb
implementations for InvoiceDB.

* channeldb: restrict invoice tests to only use an InvoiceDB instance

* docs: update release notes for 0.18.0

htlcswitch/test_utils.go

@@ -2,6 +2,7 @@ package htlcswitch
 
 import (
 	"bytes"
+	"context"
 	crand "crypto/rand"
 	"crypto/sha256"
 	"encoding/binary"
@@ -780,7 +781,9 @@ func preparePayment(sendingPeer, receivingPeer lnpeer.Peer,
 
 	// Check who is last in the route and add invoice to server registry.
 	hash := invoice.Terms.PaymentPreimage.Hash()
-	if err := receiver.registry.AddInvoice(*invoice, hash); err != nil {
+	if err := receiver.registry.AddInvoice(
+		context.Background(), *invoice, hash,
+	); err != nil {
 		return nil, nil, err
 	}
 
@@ -1338,7 +1341,9 @@ func (n *twoHopNetwork) makeHoldPayment(sendingPeer, receivingPeer lnpeer.Peer,
 	}
 
 	// Check who is last in the route and add invoice to server registry.
-	if err := receiver.registry.AddInvoice(*invoice, rhash); err != nil {
+	if err := receiver.registry.AddInvoice(
+		context.Background(), *invoice, rhash,
+	); err != nil {
 		paymentErr <- err
 		return paymentErr
 	}