[8.3-stable] Fix coverity issues, remove useless code in NTLS

[dongbeiouba]

Fix coverity issues, including resource leaks, use after free, out of bounds access, misuse of time_t, etc.

Remove useless code in NTLS, including psk and cookie extensions.

Checklist

• [ ] 在 https://yuque.com/tsdoc 增加或更新了必要的文档
• [ ] 增加或更新了必要的测试用例
• [ ] 对于重要修改，更新了CHANGES文件
• [ ] 当前修改存在对已有API参数或返回值的改变
• [ ] 当前修改存在对旧版本功能的兼容性改变（如网络协议或密码算法）