orders: add Filter() method to GetOrdersRequest and force FilteredOrders return type on wrapper functions (#1055)

* orders: filter options return on validate

* exchanges: force filter usage by wrapper return type and shift method functionality

* exchanges: update tests and fix err shadow

* exchanges: shadowland

* exchanges: more shadow land spookyness

* glorious: nits and ftx upgrade

* linter: fix

* orders: preserve unpopulated fields through filtering operation

* glorious: nits

Co-authored-by: Ryan O'Hara-Reid <ryan.oharareid@thrasher.io>

exchanges/bithumb/bithumb_test.go

@@ -391,6 +391,7 @@ func TestGetOrderHistory(t *testing.T) {
 	var getOrdersRequest = order.GetOrdersRequest{
 		Type:      order.AnyType,
 		AssetType: asset.Spot,
+		Side:      order.AnySide,
 	}
 
 	_, err := b.GetOrderHistory(context.Background(), &getOrdersRequest)