🐛 表头 cornerCell colCell 的 cell padding 设置，上下内边距不生效

### 🏷 Version

| Package | Version |
| -------------- | --------- |
| @antv/s2 | 1.30.0 |
| @antv/s2-react | |
| @antv/s2-vue | |

### Sheet Type

- [x] PivotSheet
- [ ] TableSheet
- [ ] GridAnalysisSheet
- [ ] StrategySheet

### 🖋 Description

表头 cornerCell colCell 的 cell padding 设置，上下内边距不生效，左右是生效的

### ⌨️ Code Snapshots

### 🔗 Reproduce Link
https://codesandbox.io/s/lively-forest-nh713s?file=/index.ts

### 🤔 Steps to Reproduce

### 😊 Expected Behavior
cornerCell colCell 的 cell padding 设置，所有的内边距都生效
### 😅 Current Behavior

### 💻 System information

Start with the linked CodeSandbox, especially index.ts, and reproduce the PivotSheet configuration for cornerCell and colCell cell padding. Trace the header-cell rendering path for vertical padding and verify that both horizontal and vertical padding take effect in the reproduced example.

Written by the indexing model from the issue text.