Update on "Add pass to tag external constants for delegates"

generate pte+ptd file for a delegated linear example

Differential Revision: [D73281924](https://our.internmc.facebook.com/intern/diff/D73281924/)

[ghstack-poisoned]

Author: lucylq

backends/xnnpack/operators/node_visitor.py

@@ -594,8 +594,8 @@ def get_serialized_buffer_index(
         )
 
         external_tag = None
-        if tensor.meta.get("delegate_constant_tag", None) is not None:
-            external_tag = tensor.meta["delegate_constant_tag"]
+        if tensor.meta.get("xnnpack_constant_tag", None) is not None:
+            external_tag = tensor.meta["xnnpack_constant_tag"]
         self._named_data_store.add_named_data(
             named_key,
             bytes(array),

exir/passes/external_constants_pass.py

@@ -100,6 +100,6 @@ def xnnpack_external_constants_pass(
             if node.op == "placeholder":
                 # Move specified constants to external file. If none, move all constants.
                 if names is None or node.name in names:
-                    node.meta["delegate_constant_tag"] = "_default_external_constant"
+                    node.meta["xnnpack_constant_tag"] = "_default_external_constant"
                     mutated = True
     return PassResult(gm, mutated)