wsi/common: Do not update present mode with MESA_VK_WSI_PRESENT_MODE.
Avoids a scenario where EXT_swapchain_maintenance1 present mode keeps overriding the new present mode set by MESA_VK_WSI_PRESENT_MODE. Mostly affects DXVK and vkd3d-proton content, as there aren't many other users of this feature.
Closes #11379 (closed).