[Small] Capture AttributeError when checking ray dependency. (#29024)

Signed-off-by: Chenheli Hua <huachenheli@outlook.com>

vllm/ray/lazy_utils.py

@@ -10,6 +10,8 @@ def is_ray_initialized():
         return ray.is_initialized()
     except ImportError:
         return False
+    except AttributeError:
+        return False
 
 
 def is_in_ray_actor():
@@ -24,3 +26,5 @@ def is_in_ray_actor():
         )
     except ImportError:
         return False
+    except AttributeError:
+        return False