Venus renderer side has strict entry points sanitization based on the
app requested app api version + physical device api version. So on the
driver, we should follow the same for legacy client apps.
Meanwhile, VK_PIPELINE_STAGE_NONE can't be used when we hit the sync2
emulation path, so we swap it with VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT
placeholder for the 2nd sync scope there.
Fixes: 07cee75c39 ("venus: layer vkQueueSubmit2 over vkQueueSubmit w/o sync2")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36830>
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