[OP][Feature] 统一 limit_thinking_content_length CUDA 算子，支持回复长度限制与注入序列 (#6493)

* Initial plan

* Migrate PRs #6311, #6129, #6305 to develop and merge unit tests

Co-authored-by: yuanlehome <23653004+yuanlehome@users.noreply.github.com>

* fix

* update

* fix

* fix ci

* fix ci

* Initial plan

* test: add test_chat_with_response_max_tokens to test_EB_VL_Lite_serving.py

Co-authored-by: yuanlehome <23653004+yuanlehome@users.noreply.github.com>

* test: add disable-thinking case to test_chat_with_response_max_tokens

Co-authored-by: yuanlehome <23653004+yuanlehome@users.noreply.github.com>

* test: add both reasoning_max_tokens and response_max_tokens case

Co-authored-by: yuanlehome <23653004+yuanlehome@users.noreply.github.com>

* fix ci

* fix ci

* fix ci

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: yuanlehome <23653004+yuanlehome@users.noreply.github.com>

fastdeploy/engine/sched/resource_manager_v1.py

@@ -1243,8 +1243,6 @@ class ResourceManagerV1(ResourceManager):
         If can not, return False
         """
         assert self.config.scheduler_config.splitwise_role == "decode", "Only D instance can call this method"
-        if request.reasoning_max_tokens is not None:
-            request.reasoning_max_tokens -= 1
         request.need_prefill_tokens = len(request.prompt_token_ids)
         need_prealloc_prefill_blocks = (
             request.need_prefill_tokens + self.config.cache_config.block_size - 1