resource/aws_route: SetId before WaitRouteReady

When the route's wait-for-creation operation times out,
its state is leaked as `d.SetId(...)` is called after the
`WaitRouteReady(...)`. So, the next time the configuration
is applied, the Terraform engine tries to create the same
route again, getting duplication error from AWS.

Call `d.SetId(...)` before `WaitRouteReady(...)`.

Fixes: hashicorp#23827

internal/service/ec2/route.go

@@ -239,14 +239,14 @@ func resourceRouteCreate(d *schema.ResourceData, meta interface{}) error {
 		return fmt.Errorf("error creating Route in Route Table (%s) with destination (%s): %w", routeTableID, destination, err)
 	}
 
+	d.SetId(RouteCreateID(routeTableID, destination))
+
 	_, err = WaitRouteReady(conn, routeFinder, routeTableID, destination, d.Timeout(schema.TimeoutCreate))
 
 	if err != nil {
 		return fmt.Errorf("error waiting for Route in Route Table (%s) with destination (%s) to become available: %w", routeTableID, destination, err)
 	}
 
-	d.SetId(RouteCreateID(routeTableID, destination))
-
 	return resourceRouteRead(d, meta)
 }