Fix SafeArea adjustments

[PureWeen]

Description of Change

This PR relates to some issues found here #22476 when trying to layout a Button when it's inside a layout that is partly inside the safearea.

The problem we found is that the MauiView returns a size from SizeThatFits that doesn't include the SafeAreaInsets. The arrange pass insets its Bounds and passes this value to CrossPlatformArrange but the Bounds being used is the size of the children not including the SafeAreaInsets which means the bounds used for arranging is wrong.

You can see from the screenshots below that the VSL surrounding the the entry gets arranged incorrectly

Comparison

Given the following XAML

<ContentPage
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    x:Class="Maui.Controls.Sample.MainPage"
    xmlns:local="clr-namespace:Maui.Controls.Sample"
    xmlns:ios="clr-namespace:Microsoft.Maui.Controls.PlatformConfiguration.iOSSpecific;assembly=Microsoft.Maui.Controls"
    ios:Page.UseSafeArea="false"
    >
    <VerticalStackLayout x:Name="layout" Background="Purple" IgnoreSafeArea="False" VerticalOptions="Start" IsClippedToBounds="True" >
        <Entry x:Name="label" Background="Green" Text="Hello there"></Entry>
    </VerticalStackLayout>
</ContentPage>

Before

After

Issues Fixed

Fixes #24246

[PureWeen]

/rebase

[PureWeen]

/rebase

[mattleibow]

I tested a bunch of things, and it seems to work as I would expect.