Add VFL backdoor attacks

[VioletZCJ]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind bug

/kind task

/kind feature

What does this PR do / why do we need it:
This PR builds upon the previous submission by extending the existing algorithms and introducing new capabilities to the Vertical Federated Learning (VFL) research framework:

1. Added support for new datasets in the previously implemented algorithms.

2. Introduced a novel backdoor attack algorithm.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewers:
所属项目：分布式学习中的数据安全基础理论，课题1，武汉大学，何琨老师团队
支持算法数量：9种
· gr（梯度替换攻击）：通用场景（cifar/cinic）/医疗场景（bhi）/广告场景（criteo）
· villain攻击：通用场景（cifar/cinic）/医疗场景（bhi）/广告场景（criteo）
· direct_label_inference（直接标签推理攻击）：通用场景（cifar/cinic）/医疗场景（bhi）/广告场景（criteo）

[CLAassistant]

All committers have signed the CLA.