[TKW] Introduce AbsOp as an op for Quantized LLM and GenAI workload. The tkw.abs op is lowered into math.absf and math.absi MLIR dialect for float and integer respectively.

[TKW] Introduce AbsOp as an op for Quantized LLM and GenAI workload. The tkw.abs op is lowered into math.absf and math.absi MLIR dialect for float and integer respectively. #609