multi: use the "errors" package everywhere

Replace all usages of the "github.com/go-errors/errors" and
"github.com/pkg/errors" packages with the standard lib's "errors"
package. This ensures that error wrapping and `errors.Is` checks will
work as expected.

routing/bandwidth_test.go

@@ -1,10 +1,10 @@
 package routing
 
 import (
+	"errors"
 	"testing"
 
 	"github.com/btcsuite/btcd/btcutil"
-	"github.com/go-errors/errors"
 	"github.com/lightningnetwork/lnd/fn/v2"
 	"github.com/lightningnetwork/lnd/htlcswitch"
 	"github.com/lightningnetwork/lnd/lnwallet"

routing/mock_test.go

@@ -1,12 +1,12 @@
 package routing
 
 import (
+	"errors"
 	"fmt"
 	"sync"
 
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/btcsuite/btcd/btcutil"
-	"github.com/go-errors/errors"
 	"github.com/lightningnetwork/lnd/channeldb"
 	"github.com/lightningnetwork/lnd/fn/v2"
 	"github.com/lightningnetwork/lnd/graph/db/models"

routing/payment_lifecycle_test.go

@@ -2,12 +2,12 @@ package routing
 
 import (
 	"context"
+	"errors"
 	"sync/atomic"
 	"testing"
 	"time"
 
 	"github.com/btcsuite/btcd/btcec/v2"
-	"github.com/go-errors/errors"
 	"github.com/lightningnetwork/lnd/channeldb"
 	"github.com/lightningnetwork/lnd/fn/v2"
 	"github.com/lightningnetwork/lnd/htlcswitch"

routing/probability_bimodal.go

@@ -1,12 +1,12 @@
 package routing
 
 import (
+	"errors"
 	"fmt"
 	"math"
 	"time"
 
 	"github.com/btcsuite/btcd/btcutil"
-	"github.com/go-errors/errors"
 	"github.com/lightningnetwork/lnd/lnwire"
 	"github.com/lightningnetwork/lnd/routing/route"
 )

routing/router.go

@@ -2,6 +2,7 @@ package routing
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"math"
 	"math/big"
@@ -13,7 +14,6 @@ import (
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/btcsuite/btcd/btcutil"
 	"github.com/davecgh/go-spew/spew"
-	"github.com/go-errors/errors"
 	"github.com/lightningnetwork/lnd/amp"
 	"github.com/lightningnetwork/lnd/channeldb"
 	"github.com/lightningnetwork/lnd/clock"

routing/router_test.go

@@ -20,7 +20,6 @@ import (
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/wire"
 	"github.com/davecgh/go-spew/spew"
-	"github.com/go-errors/errors"
 	sphinx "github.com/lightningnetwork/lightning-onion"
 	"github.com/lightningnetwork/lnd/channeldb"
 	"github.com/lightningnetwork/lnd/clock"
@@ -189,7 +188,7 @@ func createTestNode() (*models.LightningNode, error) {
 
 	priv, err := btcec.NewPrivateKey()
 	if err != nil {
-		return nil, errors.Errorf("unable create private key: %v", err)
+		return nil, fmt.Errorf("unable create private key: %w", err)
 	}
 
 	pub := priv.PubKey().SerializeCompressed()