AArch64: Add SME LUTv2 intrinsics

AArch64: Add SME LUTv2 intrinsics

Add intrinsic functions for the SME LUTv2 architecture extension
(`svluti4_zt`, `svwrite_lane_zt` and `svwrite_zt`).

gcc/ChangeLog:

	* config/aarch64/aarch64-sme.md (@aarch64_sme_write_zt<SVE_FULL:mode>): New insn.
	(aarch64_sme_lut_zt): Likewise.
	* config/aarch64/aarch64-sve-builtins-shapes.cc (parse_type): New type format "%T".
	(struct luti_lane_zt_base): New function shape.
	(SHAPE): Likewise.
	(struct write_zt_def): Likewise.
	(struct write_lane_zt_def): Likewise.
	* config/aarch64/aarch64-sve-builtins-shapes.h: New function shape.
	* config/aarch64/aarch64-sve-builtins-sme.cc (class svluti_zt_impl): New function expander.
	(class svwrite_zt_impl): Likewise.
	(class svwrite_lane_zt_impl): Likewise.
	(FUNCTION): Likewise
	* config/aarch64/aarch64-sve-builtins-sme.def (svwrite_zt): New function shape.
	(svwrite_lane_zt): Likewise.
	(svluti4_zt): Likewise.
	* config/aarch64/aarch64-sve-builtins-sme.h: New function base.
	* config/aarch64/aarch64-sve-builtins.h: Mention the arrays of function_group_info by name.

gcc/testsuite/ChangeLog:

	* gcc.target/aarch64/sme2/acle-asm/svluti4_zt_1.c: New test.
	* gcc.target/aarch64/sme2/acle-asm/svwrite_lane_zt_1.c: New test.
	* gcc.target/aarch64/sme2/acle-asm/svwrite_zt_1.c: New test.
	* gcc.target/aarch64/sve/acle/general-c/svluti4_zt_1.c: New test.
	* gcc.target/aarch64/sve/acle/general-c/svwrite_lane_zt_1.c: New test.
	* gcc.target/aarch64/sve/acle/general-c/svwrite_zt_1.c: New test.