2.5.x torch2.6

## Description <!-- Brief description. Refer to the related issues if existed. It'll be great if relevant reviewers can be assigned as well.--> ## Checklist Please feel free to remove inapplicable items for your PR. - [ ] The PR title starts with [$CATEGORY] (such as [NN], [Model], [Doc], [Feature]]) - [ ] I've leverage the [tools](https://docs.google.com/document/d/1iHyj7zlmygKSk5gBPsqIqL5ASPzJSPREaNT_QdsiYA4/edit) to beautify the python and c++ code. - [ ] The PR is complete and small, read the [Google eng practice (CL equals to PR)](https://google.github.io/eng-practices/review/developer/small-cls.html) to understand more about small PR. In DGL, we consider PRs with less than 200 lines of core code change are small (example, test and documentation could be exempted). - [ ] All changes have test coverage - [ ] Code is well-documented - [ ] To the best of my knowledge, examples are either not affected by this change, or have been fixed to be compatible with this change - [ ] Related issue is referred in this PR - [ ] If the PR is for a new model/paper, I've updated the example index [here](../examples/README.md). ## Changes <!-- You could use following template - [ ] Feature1, tests, (and when applicable, API doc) - [ ] Feature2, tests, (and when applicable, API doc) -->