AVX10.2 ymm rounding: Support vscalefp{s,d,h} intrins

gcc/ChangeLog:

	* config/i386/avx10_2roundingintrin.h: New intrins.
	* config/i386/i386-builtin.def: Add new builtins.
	* config/i386/sse.md:
	(<avx512>_scalef<mode><mask_name><round_name>): Add condition check.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/avx-1.c: Add new builtin test.
	* gcc.target/i386/sse-13.c: Ditto.
	* gcc.target/i386/sse-14.c: Ditto.
	* gcc.target/i386/sse-22.c: Add new macro test.
	* gcc.target/i386/sse-23.c: Ditto.
	* gcc.target/i386/avx10_2-rounding-3.c: Add test.