anv: defer binding table block allocation to when necessary

anv: defer binding table block allocation to when necessary

There are cases where we never need a binding table block, for example
compute only command buffers.

This has also the nice effect of not having
dEQP-VK.api.object_management.* tests allocate 1Gb of binding tables
which are staying around forever after you run those tests.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/8806
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Ivan Briano <ivan.briano@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23079>