support frequency penalty #713
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Motivation
support more sampling ways, like presence_penalty(already implemented but never used) and frequency_penalty(supported in vllm).
Modification
I mainly add a kernal function in
src/turbomind/kernels/sampling_penalty_kernels.cu, which implemented frequency penalty sampling method. Then enable it by addpresence_penaltyandfrequency_penaltyparam insrc/turbomind/models/llama/LlamaBatch.cc, where I just reuse the bufferh_repetition_penalty_.