update toolchain and move disconnect method

Signed-off-by: smcavallo <[email protected]>

go.mod

@@ -6,8 +6,6 @@ module github.com/crossplane/upjet
 
 go 1.22.7
 
-toolchain go1.23.1
-
 require (
 	dario.cat/mergo v1.0.0
 	github.com/alecthomas/kingpin/v2 v2.4.0

pkg/controller/external.go

@@ -140,10 +140,6 @@ type external struct {
 	logger            logging.Logger
 }
 
-func (e *external) Disconnect(ctx context.Context) error {
-	return nil
-}
-
 func (e *external) scheduleProvider(name string) (bool, error) {
 	if e.providerScheduler == nil || e.workspace == nil {
 		return false, nil
@@ -432,6 +428,10 @@ func (e *external) Delete(ctx context.Context, mg xpresource.Managed) (managed.E
 	return managed.ExternalDelete{}, errors.Wrap(e.workspace.Destroy(ctx), errDestroy)
 }
 
+func (e *external) Disconnect(_ context.Context) error {
+	return nil
+}
+
 func (e *external) Import(ctx context.Context, tr resource.Terraformed) (managed.ExternalObservation, error) {
 	res, err := e.workspace.Import(ctx, tr)
 	if err != nil {