[CIR] Extract base classes for complex ops (#185262)
Extract CIR_ComplexPartOp for ComplexRealOp/ComplexImagOp,
CIR_ComplexPartPtrOp for ComplexRealPtrOp/ComplexImagPtrOp,
CIR_ComplexBinOp for ComplexAddOp/ComplexSubOp, and
CIR_ComplexRangeBinOp for ComplexMulOp/ComplexDivOp to
eliminate duplicated arguments, results, format, and traits.
