[AArch64] lower abs intrinsic to new ABS instruction in GIsel

When feature CSSC is available, the abs intrinsic should map to the
new scalar ABS instruction when using GlobalIsel

spec:
https://developer.arm.com/documentation/ddi0602/2022-09/Base-Instructions/ABS--Absolute-value-

Reviewed By: aemerson

Differential Revision: https://reviews.llvm.org/D139419