[jOOQ/jOOQ#8751] Slightly improve performance of Integer rendering

When rendering Integer values (e.g. represented by Val objects) the
`DefaultIntegerBinding` can be optimized to use `RenderContext#sql(int)`
rather than `RenderContext#sql(String)`, as the latter requires to first
call `Integer#toString()`.

jOOQ/src/main/java/org/jooq/impl/DefaultBinding.java

@@ -2380,7 +2380,7 @@ public class DefaultBinding<T, U> implements Binding<T, U> {
 
         @Override
         final void sqlInline0(BindingSQLContext<U> ctx, Integer value) {
-            ctx.render().sql(value.toString());
+            ctx.render().sql(value);
         }
 
         @Override