SettingsCard ControlTemplate is also applied to Header, HeaderIcon and Description

### Describe the bug

This code:
```xaml

```
will render:

### Steps to reproduce
Use the code above.

### Expected behavior

`ContentTemplate` is applied only to the `Content`.


### Screenshots

_No response_

### Code Platform

- [ ] UWP
- [x] WinAppSDK / WinUI 3
- [ ] Web Assembly (WASM)
- [ ] Android
- [ ] iOS
- [ ] MacOS
- [ ] Linux / GTK

### Windows Build Number

- [ ] Windows 10 1809 (Build 17763)
- [ ] Windows 10 1903 (Build 18362)
- [ ] Windows 10 1909 (Build 18363)
- [ ] Windows 10 2004 (Build 19041)
- [ ] Windows 10 20H2 (Build 19042)
- [ ] Windows 10 21H1 (Build 19043)
- [ ] Windows 10 21H2 (Build 19044)
- [ ] Windows 10 22H2 (Build 19045)
- [ ] Windows 11 21H2 (Build 22000)
- [ ] Other (specify)

### Other Windows Build number

_No response_

### App minimum and target SDK version

- [x] Windows 10, version 1809 (Build 17763)
- [ ] Windows 10, version 1903 (Build 18362)
- [ ] Windows 10, version 1909 (Build 18363)
- [ ] Windows 10, version 2004 (Build 19041)
- [ ] Windows 10, version 2104 (Build 20348)
- [ ] Windows 11, version 22H2 (Build 22000)
- [ ] Other (specify)

### Other SDK version

_No response_

### Visual Studio Version

Preview

### Visual Studio Build Number

Version 17.13.0 Preview 2.1

### Device form factor

Desktop

### Additional context

The following is mentioned on the ControlPresenter's [doc](https://learn.microsoft.com/en-us/windows/windows-app-sdk/api/winrt/microsoft.ui.xaml.controls.contentpresenter?view=windows-app-sdk-1.6&WT.mc_id=%3Fwt.mc_id%3DMVP_356303):
> If the ContentPresenter is in the ControlTemplate of a ContentControl, the ContentPresenter behavior will implicitly bind to the ContentTemplate and Content properties of the templated ContentControl.

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Yes, I'd like to be assigned to work on this item.