interfaces: convert `repository.ipeerrequests` from zope `Attribute` attrs

This is the same transformation as b455dfddfed0 did for dirstate.

mercurial/interfaces/repository.py

@@ -373,9 +373,8 class ipeercommandexecutor(Protocol):
 class ipeerrequests(Protocol):
     """Interface for executing commands on a peer."""
 
-    limitedarguments = interfaceutil.Attribute(
-        """True if the peer cannot receive large argument value for commands."""
-    )
+    limitedarguments: bool
+    """True if the peer cannot receive large argument value for commands."""
 
     def commandexecutor(self):
         """A context manager that resolves to an ipeercommandexecutor.