CheckBox VerticalContentAlignment is ignored on Fluent theme

[maxkatz6]

Reopen of #18140

I closed original issue without fully understanding the issue. That issue wasn't really about comparing styling to WPF, but actual bug with CheckBox simply ignoring VerticalContentAlignment.
For some reason I can't unlock original one, github fails with an error. So creating a new one instead.

Describe the bug

To Reproduce

   <CheckBox VerticalContentAlignment="Center">
       <TextBlock>
           Some Text<LineBreak />
           Even More<LineBreak />
           And More<LineBreak />
           More</TextBlock>
   </CheckBox>

Expected behavior

in wpf

Avalonia version

11.1.0

OS

No response

Additional context

No response

cc @luojunyuan