[CIR] Add non-floating-point builtin intrinsics (#178093) ## Summary This PR adds support for non-floating-point builtin intrinsics as a follow-up to #175233: - Integer `abs`/`labs`/`llabs` with `cir.abs` operation - `__builtin_unpredictable` handling - Integer elementwise abs support - Tests: `builtin-rotate.c`, `pred-info-builtins.c`, updates to `libc.c` and `builtins-elementwise.c` ## Dependency **This PR depends on #175233 (FP math builtins) and should be merged after it.** The non-FP builtins were split from #175233 per reviewer feedback to reduce PR size. ## Test plan - [x] All CIR codegen tests pass - [x] All CIR tests pass
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