[Feature][Executor] GPU Model Runner Supports prompt_logprobs and max_logprobs (#4769)

fastdeploy/engine/sampling_params.py

@@ -97,6 +97,7 @@ class SamplingParams:
     reasoning_max_tokens: Optional[int] = None
     min_tokens: int = 1
     logprobs: Optional[int] = None
+    prompt_logprobs: Optional[int] = None
     # For logits and logprobs post processing
     temp_scaled_logprobs: bool = False
     top_p_normalized_logprobs: bool = False