i386: Update Suffix for AVX10.2 SAT CVT scalar Intrinsics

The previous _ep[i|u]{32,64} suffix for scalar SAT CVT intrinsics does
not match the intrinsic naming convention: scalar convert intrinsics
have used _[i|u]{32,64} (with _si{32,64} aliases for signed variants)
since AVX-512F, so the AVX10.2 scalar SAT CVT names need to follow the
same convention.

This patch renames the scalar SAT CVT intrinsics to use _[i|u]{32,64}
suffix and provides _si{32,64} aliases for the signed intrinsics.

gcc/ChangeLog:

	* config/i386/avx10_2satcvtintrin.h
	(_mm_cvtts_sd_i32): Renamed from _mm_cvtts_sd_epi32.
	(_mm_cvtts_sd_si32): New alias of _mm_cvtts_sd_i32.
	(_mm_cvtts_sd_u32): Renamed from _mm_cvtts_sd_epu32.
	(_mm_cvtts_ss_i32): Renamed from _mm_cvtts_ss_epi32.
	(_mm_cvtts_ss_si32): New alias of _mm_cvtts_ss_i32.
	(_mm_cvtts_ss_u32): Renamed from _mm_cvtts_ss_epu32.
	(_mm_cvtts_roundsd_i32): Renamed from _mm_cvtts_roundsd_epi32.
	(_mm_cvtts_roundsd_si32): New alias of _mm_cvtts_roundsd_i32.
	(_mm_cvtts_roundsd_u32): Renamed from _mm_cvtts_roundsd_epu32.
	(_mm_cvtts_roundss_i32): Renamed from _mm_cvtts_roundss_epi32.
	(_mm_cvtts_roundss_si32): New alias of _mm_cvtts_roundss_i32.
	(_mm_cvtts_roundss_u32): Renamed from _mm_cvtts_roundss_epu32.
	(_mm_cvtts_sd_i64): Renamed from _mm_cvtts_sd_epi64.
	(_mm_cvtts_sd_si64): New alias of _mm_cvtts_sd_i64.
	(_mm_cvtts_sd_u64): Renamed from _mm_cvtts_sd_epu64.
	(_mm_cvtts_ss_i64): Renamed from _mm_cvtts_ss_epi64.
	(_mm_cvtts_ss_si64): New alias of _mm_cvtts_ss_i64.
	(_mm_cvtts_ss_u64): Renamed from _mm_cvtts_ss_epu64.
	(_mm_cvtts_roundsd_i64): Renamed from _mm_cvtts_roundsd_epi64.
	(_mm_cvtts_roundsd_si64): New alias of _mm_cvtts_roundsd_i64.
	(_mm_cvtts_roundsd_u64): Renamed from _mm_cvtts_roundsd_epu64.
	(_mm_cvtts_roundss_i64): Renamed from _mm_cvtts_roundss_epi64.
	(_mm_cvtts_roundss_si64): New alias of _mm_cvtts_roundss_i64.
	(_mm_cvtts_roundss_u64): Renamed from _mm_cvtts_roundss_epu64.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/avx10_2-satcvt-1.c: Update intrin names and
	add _si alias tests.
	* gcc.target/i386/sse-14.c: Ditto.
	* gcc.target/i386/sse-22.c: Ditto.
	* gcc.target/i386/avx10_2-vcvttsd2sis-2.c: Update intrin names.
	* gcc.target/i386/avx10_2-vcvttsd2usis-2.c: Ditto.
	* gcc.target/i386/avx10_2-vcvttss2sis-2.c: Ditto.
	* gcc.target/i386/avx10_2-vcvttss2usis-2.c: Ditto.
	* gcc.target/i386/zext-avx10-1.c: Ditto.