[Doc] Convert Sphinx directives ( {class}, {meth}, {attr}, ...) to MkDocs format for better documentation linking (#18663)

Signed-off-by: Zerohertz <ohg3417@gmail.com>

vllm/model_executor/models/utils.py

@@ -66,7 +66,7 @@ class WeightsMapper:
 
 class AutoWeightsLoader:
     """
-    Helper class to load weights into a {class}`torch.nn.Module`. It is able
+    Helper class to load weights into a [`torch.nn.Module`][]. It is able
     to automatically detect child modules and parameters while iterating over
     the weights only once.