lima: Add a NIR load duplicating pass

lima: Add a NIR load duplicating pass

and use it with vertex shaders.

Note:
The commit was originally authored by Connor Abbott <cwabbott@gmail.com>
and was cherry-picked from <mesa/mesa!2315>.
Apart from some changes, which were necessary due to rebasing, the following
changes have been added:
clone_intrinsic() was changed to use nir_instr_clone() instead of
doing it manually.
Tests against `src->parent_instr->type != nir_instr_type_phi` have been
inserted, otherwise we may run into a nir validation error.
Intrinsic load_input and load_uniform  are not duplicated, if their source
type is nir_instr_type_load_const.
The above changes are

Signed-off-by: Andreas Baierl <ichgeh@imkreisrum.de>
Reviewed-by: Erico Nunes <nunes.erico@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7682>