glx: Add back in applegl_create_display() so the OpenGL.framework, on MacOS, pointer get setup.

Fixes: 4e8740370a ("glx: rework __glXInitialize")

Tested-by: Yurii Kolesnykov <root@yurikoles.com>
(cherry picked from commit 20b806284a)

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33113>

.pick_status.json

@@ -664,7 +664,7 @@
         "description": "glx: Add back in `applegl_create_display()` so the OpenGL.framework, on MacOS, pointer get setup.",
         "nominated": true,
         "nomination_type": 2,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": "4e8740370adaad5f8992c13262e1dfc66274d838",
         "notes": null

src/glx/glxext.c

@@ -1078,6 +1078,13 @@ __glXInitialize(Display * dpy)
    glx_driver |= GLX_DRIVER_SW;
 #endif
 
+#if defined(GLX_USE_APPLEGL) && !defined(GLX_USE_APPLE)
+   if (!applegl_create_display(dpyPriv)) {
+      free(dpyPriv);
+      return NULL;
+   }
+#endif
+
    if (!AllocAndFetchScreenConfigs(dpy, dpyPriv, glx_driver, !env)) {
       Bool fail = True;
 #if defined(GLX_DIRECT_RENDERING) && (!defined(GLX_USE_APPLEGL) || defined(GLX_USE_APPLE))