vulkan: Properly filter entrypoints

vulkan: Properly filter entrypoints

We now use get_all_required() to get all required commands and use that
to filter instead of doing it manually.  Also, we can pull entrypoint
extension etc. information from the requirements struct.  Finally, we
also have to filter the actual commands themselves as well as arguments
per-API because there may be multiple versions or variants depending on
the API being used.

Acked-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21225>