Workaround for broken VSync in Simulate on macOS.

OpenGL VSync became broken again in macOS 13 (https://github.com/glfw/glfw/issues/2249). This workaround is similar to https://github.com/glfw/glfw/pull/2277 but is implemented entirely outside of GLFW.

PiperOrigin-RevId: 516320722
Change-Id: Ib8a651a942f592c74e00ad3c7b22f2dfd156be5f

simulate/glfw_dispatch.cc

@@ -114,6 +114,10 @@ const struct Glfw& Glfw(void* dlhandle) {
     mjGLFW_INITIALIZE_SYMBOL(glfwWindowShouldClose);
     // go/keep-sorted end
 
+#ifdef __APPLE__
+    mjGLFW_INITIALIZE_SYMBOL(glfwGetNSGLContext);
+#endif
+
 #undef mjGLFW_INITIALIZE_SYMBOL
 
     return glfw;