PyTorch 2.6.0 Release

* Highlights * Tracked Regressions * Backwards Incompatible Change * Deprecations * New Features * Improvements * Bug fixes * Performance * Documentation * Developers ## **Highlights** We are excited to announce the release of PyTorch® 2.6 ([release notes](https://github.com/pytorch/pytorch/releases/tag/v2.6.0))! This release features multiple improvements for PT2: `torch.compile` can now be used with Python 3.13; new performance-related knob `torch.compiler.set_stance`; several AOTInductor enhancements. Besides the PT2 improvements, another highlight is FP16 support on X86 CPUs. NOTE: Star...