gallium/hash_table: remove some function wrappers

Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3722>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3722>
32 files changed