Revert to OpenGL as the default 2D rendering pipeline for macOS

Summary

Revert to OpenGL as the default Java 2D rendering pipeline for macOS

Problem

CSR https://bugs.openjdk.java.net/browse/JDK-8265305 approved switching to Metal as the default rendering pipeline for JDk 17 as a temporary experiment. We now need to revert to OpenGL as per the plan.

Solution

Revert to OpenGL as the default pipeline and Metal will again become the optional pipeline. This will restore the behavior in CSR https://bugs.openjdk.java.net/browse/JDK-8262499

Specification

OpenGL will be default where available. To select Metal instead you specify -Dsun.java2d.metal= "True" | "true", or equivalently -Dsun.java2d.opengl=false