pytorch

5ca9b2b6 - Enable `dim=None` for `torch.var` (#82765)

Enable `dim=None` for `torch.var` (#82765) ### Description Add support for `dim=None` in `torch.var` ### Issue Part of #29137 ### Testing N/A Pull Request resolved: https://github.com/pytorch/pytorch/pull/82765 Approved by: https://github.com/albanD