egl/kopper: Don't add EGL_SWAP_BEHAVIOR_PRESERVED_BIT configs

It's strictly inferior to EGL_EXT_buffer_age so apps shouldn't bother to
begin with, and we don't communicate the surface preservation state to
the backend so we don't handle it correctly in any case.

Acked-by: Eric Engestrom <eric@igalia.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18214>

src/egl/drivers/dri2/platform_x11.c

@@ -1498,7 +1498,7 @@ dri2_initialize_x11_swrast(_EGLDisplay *disp)
       disp->Extensions.ANGLE_sync_control_rate = EGL_TRUE;
    }
 
-   if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
+   if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, !disp->Options.Zink))
       goto cleanup;
 
    /* Fill vtbl last to prevent accidentally calling virtual function during