feat: Add ColBERT late interaction model support (#33686)

Signed-off-by: Ilya Boytsov <ilyaboytsov1805@gmail.com>
Signed-off-by: Ilya Boytsov <boytsovpanamera@mail.ru>
Co-authored-by: Cyrus Leung <cyrus.tl.leung@gmail.com>
Co-authored-by: wang.yuqi <yuqi.wang@daocloud.io>

vllm/config/model.py

@@ -1411,6 +1411,11 @@ class ModelConfig:
             self._model_info.supports_cross_encoding or self.convert_type == "classify"
         )
 
+    @property
+    def is_late_interaction(self) -> bool:
+        """Check if model uses late interaction (ColBERT-style) scoring."""
+        return self._model_info.supports_late_interaction
+
     @property
     def is_pp_supported(self) -> bool:
         return self._model_info.supports_pp