message: Expose where_v2 as v1=["where_v2"], v2=["where"]
diff: @@ -3177,6 +3177,7 @@ def where(condition, x=None, y=None, name=None):
  raise ValueError("x and y must both be non-None or both be None.")
  +@tf_export(v1=["where_v2"], v2=["where"])
  def where_v2(condition, x=None, y=None, name=None):
  """Return the elements, either from `x` or `y`, depending on the `condition`.
  If both `x` and `y` are None, then this operation returns the coordinates of
  