[Core][Hybrid allocator + kv connector 1/n] Enable hybrid allocator + KV cache connector (#25712)

Signed-off-by: KuntaiDu <kuntai@uchicago.edu>
Signed-off-by: Kuntai Du <kuntai@uchicago.edu>

tests/v1/core/utils.py

@@ -46,6 +46,7 @@ def create_scheduler(
     num_speculative_tokens: int | None = None,
     skip_tokenizer_init: bool = False,
     async_scheduling: bool = False,
+    disable_hybrid_kv_cache_manager: bool = False,
 ) -> Scheduler | AsyncScheduler:
     """Create scheduler under test.
 
@@ -70,6 +71,7 @@ def create_scheduler(
         disable_chunked_mm_input=disable_chunked_mm_input,
         enable_chunked_prefill=True,
         async_scheduling=async_scheduling,
+        disable_hybrid_kv_cache_manager=disable_hybrid_kv_cache_manager,
     )
     model_config = ModelConfig(
         model=model,