[CIR][AArch64] Add missing lowerings for vceqz_* Neon builtins (#184893)
Implement the remaining CIR lowerings for the AdvSIMD (Neon)
`vceqz{|q|d|s}_*` intrinsic group (bitwise equal to zero).
The `vceqzd_s64` variant was already supported; this patch completes
the rest of the group [1].
Tests for these intrinsics are moved from:
* test/CodeGen/AArch64/neon-misc.c
to:
* test/CodeGen/AArch64/neon/intrinsics.c
The implementation largely mirrors the existing lowering in
CodeGen/TargetBuiltins/ARM.cpp.
`emitCommonNeonBuiltinExpr` is introduced to support these lowerings.
`getNeonType` is moved without functional changes.
Reference:
[1] https://arm-software.github.io/acle/neon_intrinsics/advsimd.html#bitwise-equal-to-zero