🐛 [Bug]: dialog组件，打开modal框的时候，配置buttons属性为空数组，模态框底部区域出现大片留白

[zhangbiao-coder]

Version

16.2.0

Angular Version

16.2.0

Link to minimal reproduction

//当配置弹框属性buttons为空数组时出现
const result = this.dialogservices.open({
buttons:[]
})；

Step to reproduce

//当配置弹框属性buttons为空数组时出现
const result = this.dialogservices.open({
buttons:[]
})；

What is expected

No response

What is actually happening

No response

Any additional comments (optional)

[foolmadao]

不需要按钮的建议使用modal，dialog几个区域固定了位置样式，我们后续看下是否需要做动态优化判断。