2.7.0rc7: Bug fixes

What's Changed

• Docs examples, notebook updates [skip ci] by @nvkevlu in #3757
• update requirements.txt for Hierarchical Fed Stats [skip ci] by @chesterxgchen in #3758
• Fix federated Stats Advanced folders by @chesterxgchen in #3753
• hello-pt: restore requirements installation and handle Colab by @chesterxgchen in #3760
• fix code that overwrite the original notebook. Fix Colab issue for hello-pt by @chesterxgchen in #3761
• Add colab support 3 by @chesterxgchen in #3762
• Update the swarm learning example. by @IsaacYangSLA in #3759
• Reset task_data in client after executor is run. by @nvidianz in #3763
• Fix SNPAuthorizer issue by @YuanTingHsieh in #3764
• fix image_stats.ipynb by @chesterxgchen in #3768
• Fixed XGB Plugin Compiling Errors by @nvidianz in #3767
• Updates on llm and xgb examples by @ZiyueXu77 in #3765
• fix notebooks in advanced directory 4 by @chesterxgchen in #3769
• Update CC docs [skip ci] by @YuanTingHsieh in #3756

Full Changelog: 2.7.0rc6...2.7.0rc7