[WinUI3] Operating system info missing in reports

### Package

Sentry

### .NET Flavor

.NET

### .NET Version

8.0.2

### OS

Windows

### SDK Version

4.2.1

### Self-Hosted Sentry Version

_No response_

### Steps to Reproduce

Send test exception to Sentry from a WinUI3 app.

### Expected Result

See detailed info about operating system - incl. build version, e.g. Windows 11 (build 22631.3374).

### Actual Result

WinUI3:
- The "os.name=Windows" doesn't give me any additional information compared to "os=Windows 11"
- Build number missing (e.g. `22631.3374` or `10.0.22631`)

The build information can be gathered via `Environment.OSVersion.Version`. Additionally, it could be helpful to enrich the exception with the machine name (e.g. laptop model), similar how on iOS it shows "device=iPhone 13 Pro". This information can be gathered using `Environment.MachineName`