aarch64: Add support for unpacked SVE mult, max and min

aarch64: Add support for unpacked SVE mult, max and min

This patch makes the SVE_INT_BINARY_IMM patterns support
unpacked arithmetic, covering MUL, SMAX, SMIN, UMAX and UMIN.
For min and max, the type suffix must be taken from the element
size rather than the container size.

The XFAILs are due to PR98602.

gcc/
	* config/aarch64/aarch64-sve.md (<SVE_INT_BINARY_IMM:optab><mode>3)
	(@aarch64_pred_<SVE_INT_BINARY_IMM:optab><mode>)
	(*post_ra_<SVE_INT_BINARY_IMM:optab><mode>3): Extend from SVE_FULL_I
	to SVE_I.

gcc/testsuite/
	PR testsuite/98602
	* g++.target/aarch64/sve/max_1.C: New test.
	* g++.target/aarch64/sve/min_1.C: Likewise.
	* gcc.target/aarch64/sve/mul_2.c: Likewise.