x86: Add non-destructive source to @xorsign<mode>3_1

Add non-destructive source alternative to @xorsign<mode>3_1 for AVX.

gcc/

	PR target/89984
	* config/i386/i386-expand.c (ix86_split_xorsign): Use operands[2].
	* config/i386/i386.md (@xorsign<mode>3_1): Add non-destructive
	source alternative for AVX.

gcc/testsuite/

	PR target/89984
	* gcc.target/i386/pr89984-1.c: New test.
	* gcc.target/i386/pr89984-2.c: Likewise.
	* gcc.target/i386/xorsign-avx.c: Likewise.