FrameworkElementExtensions.Cursor is not available on WASDK target

[Difegue]

Describe the bug

As mentioned here:
https://github.com/CommunityToolkit/Windows/blob/321f5ddc8f3bf07865c8f51d992febb25fd7859a/components/Extensions/src/Element/FrameworkElementExtensions.Mouse.cs#L16
the Cursor extension was willingly disabled on WASDK targets during initial porting to v8.

However, I'm fairly sure the extension works on WASDK, as the v7 variant works without any issue.

Steps to reproduce

Try using the sample code for the Cursor extension on a WinUI3 project  

<Page
    x:Class="Microsoft.Toolkit.Uwp.SampleApp.SamplePages.MouseCursorPage"
    xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:ui="using:CommunityToolkit.WinUI">

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <Border
            ui:FrameworkElementExtensions.Cursor="Hand"
            Width="220" Height="120" Background="DeepSkyBlue"
            HorizontalAlignment="Center" VerticalAlignment="Center"/>
    </Grid>
</Page>

Expected behavior

I think the #if !WINAPPSDK block for this extension could be removed, making it available on v8.

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)
• [x] Windows 11 21H2 (Build 22000)
• [ ] Other (specify)

Other Windows Build number

No response

App minimum and target SDK version

• [ ] 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

No response

Visual Studio Build Number

No response

Device form factor

No response

Additional context

No response

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