[Testing] SDPA vs PA: debug prints

[itikhono]

tools/continuous_batching/accuracy/continuous_batching_accuracy.cpp : SDPA vs PA generation pipelines

src/cpp/src/continuous_batching_impl.cpp : add outputs to PA
src/cpp/src/model_runner.hpp : print PA outputs to file

src/cpp/src/llm_pipeline.cpp : add output to SDPA
src/cpp/src/lm_encoding.cpp : print SDPA outputs to file

src/cpp/src/sampler.cpp : print SDPA and PA logits