zink/codegen: do not automatically consider extensions promoted

zink/codegen: do not automatically consider extensions promoted

...until an entry is added to VERSIONS in zink_device_info.py.

Now that we stop obtaining feature structs of promoted extensions when the VK
impl is new enough, it's possible for things to break when someone updates
vk.xml, and extensions get promoted but the codegen is not updated to include
e.g. info->feats13 and info->props13 (or newer) in zink_device_info

Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16265>