feat: support modify attn_implementation of vision tower

modeling_vision_tower.py

@@ -44,6 +44,10 @@ def build_vision_tower(vision_tower_cfg, **kwargs):
     if "siglip-so400m-patch14-384" in vision_tower:
         # Eagle
         if getattr(vision_tower_cfg, "eagle_vision_tower", None) is not None:
+            if getattr(vision_tower_cfg, "_vit_attn_implementation", None) is not None:
+                qwen2vl_vit_config._attn_implementation = vision_tower_cfg._vit_attn_implementation
+                qwen2vl_vit_config._attn_implementation_internal = vision_tower_cfg._vit_attn_implementation
+            
             qwen2vl_vision_tower = Qwen2VisionTransformerPretrainedModel._from_config(qwen2vl_vit_config)
             
             if getattr(vision_tower_cfg, "navit_merger_hidden_dim", None) is not None: