[Windows] FileSystemException: Cannot delete file

## 🐛 Bug Report
stacktrace like this:
```
FileSystemException: FileSystemException: Cannot delete file, path = 'E:\娱乐\TapBooster\cache\temp\libCachedImageData\e2ac1550-dc22-11ec-a02b-eb8d38960b87.jpg' (OS Error: 另一个程序正在使用此文件，进程无法访问。
, errno = 32)
File "file_impl.dart", line 283, in _File._delete.
File "zone.dart", line 1434, in _rootRunUnary
File ""
File "forwarding_file_system_entity.dart", line 66, in ForwardingFileSystemEntity.delete
File ""
File "web_helper.dart", line 219, in WebHelper._removeOldFile
```

### Expected behavior

Catch exception

**Version:** v3.3.0

**Platform:**
- [ ] 🖥️ Windows

从 web_helper.dart 第 219 行的 WebHelper._removeOldFile 开始，检查文件删除是如何处理的。如果可能，复现 Windows 故障，并验证当另一个进程正在使用该文件时，FileSystemException 会被捕获，同时不会使清理操作失败。

由索引模型根据 Issue 内容生成。