Do not forward parent's value range to CSE variable for variables created within codegen. (#123099)

Consider we are generating code for `ops.gt`, and within it we call
`ops.to_dtype`. Before, we would forward the bounds from `gt` to the
to the result of `to_dtype`, which is wrong.

Pull Request resolved: https://github.com/pytorch/pytorch/pull/123099
Approved by: https://github.com/jgong5, https://github.com/peterbell10

torch/_inductor/codegen/common.py

@@ -1456,8 +1456,9 @@ class Kernel(CodeGen):
                 def inner(*args, **kwargs):
                     # TritonTemplateKernel has no current_node
                     buf_bounds = ValueRanges.unknown()
-                    if hasattr(V.interpreter, "current_node"):
-                        fx_node = V.interpreter.current_node
+                    if (
+                        fx_node := getattr(V.interpreter, "current_node", None)
+                    ) and fx_node.target == name:
                         assert isinstance(self.node_to_bounds, dict)
                         buf_bounds = self.node_to_bounds.get(
                             fx_node, ValueRanges.unknown()