aarch64: Make more use of sve_type in ACLE code

aarch64: Make more use of sve_type in ACLE code

This patch makes some functions operate on sve_type, rather than just
on type suffixes.  It also allows an overload to be resolved based on
a mode and sve_type.  In this case the sve_type is used to derive the
group size as well as a type suffix.

This is needed for the SME2 intrinsics and the new tuple forms of
svreinterpret.  No functional change intended on its own.

gcc/
	* config/aarch64/aarch64-sve-builtins.h
	(function_resolver::lookup_form): Add an overload that takes
	an sve_type rather than type and group suffixes.
	(function_resolver::resolve_to): Likewise.
	(function_resolver::infer_vector_or_tuple_type): Return an sve_type.
	(function_resolver::infer_tuple_type): Likewise.
	(function_resolver::require_matching_vector_type): Take an sve_type
	rather than a type_suffix_index.
	(function_resolver::require_derived_vector_type): Likewise.
	* config/aarch64/aarch64-sve-builtins.cc (num_vectors_to_group):
	New function.
	(function_resolver::lookup_form): Add an overload that takes
	an sve_type rather than type and group suffixes.
	(function_resolver::resolve_to): Likewise.
	(function_resolver::infer_vector_or_tuple_type): Return an sve_type.
	(function_resolver::infer_tuple_type): Likewise.
	(function_resolver::infer_vector_type): Update accordingly.
	(function_resolver::require_matching_vector_type): Take an sve_type
	rather than a type_suffix_index.
	(function_resolver::require_derived_vector_type): Likewise.
	* config/aarch64/aarch64-sve-builtins-shapes.cc (get_def::resolve)
	(set_def::resolve, store_def::resolve, tbl_tuple_def::resolve): Update
	calls accordingly.