Remove creation of duplicate value (#2775)

Remove creation of duplicate value when processing variables defined
within a loop.

Signed-off-by: Ganesan Ramalingam <grama@microsoft.com>

Author: gramalingam

onnxscript/_internal/converter.py

@@ -1271,13 +1271,12 @@ def _translate_loop_stmt(self, loop_stmt: ast.For | ast.While) -> None:
             # TODO: retrieve the annotation for variable pv is any is specified.
             # typeinfo = self._eval_constant_expr(pv.annotation)
             typeinfo = None
-            self._current_fn.append_parameter(
-                make_value(onnx_var_name, typeinfo, self._source_of(loop_stmt))
-            )
+            parameter = make_value(onnx_var_name, typeinfo, self._source_of(loop_stmt))
+            self._current_fn.append_parameter(parameter)
             self._bind(
                 pv,
                 values.SymbolValue(
-                    ir.Value(name=onnx_var_name),
+                    parameter,
                     self._source_of(loop_stmt),
                 ),
             )