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/simulate.cc

@@ -1950,6 +1950,9 @@ void Simulate::renderloop() {
   uiModify(&this->ui0, &this->uistate, &this->platform_ui->mjr_context());
   uiModify(&this->ui1, &this->uistate, &this->platform_ui->mjr_context());
 
+  // set VSync to initial value
+  this->platform_ui->SetVSync(this->vsync);
+
   // run event loop
   while (!this->platform_ui->ShouldCloseWindow() && !this->exitrequest.load()) {
     {