[iOS] Allow compat iOS buttons to resize image and to respect spacing and padding

src/Controls/samples/Controls.Sample.UITests/Issues/Issue18242_2.xaml

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+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Maui.Controls.Sample.Issues.Issue18242_2">
+  <ScrollView>
+    <VerticalStackLayout 
+      Margin="0,10,0,0">
+      <Label 
+        Text="Image on Bottom" 
+        HorizontalTextAlignment="Center" />
+      <Button 
+        x:Name="BottonButton"
+        ImageSource="dotnet_bot.png" 
+        Text="Button 1"
+        TextColor="Black"
+        ContentLayout="Bottom, 20" 
+        Background="LightGray"/>
+      <BoxView 
+        HeightRequest="30"/>
+      <Label 
+        Text="Image on Top" 
+        HorizontalTextAlignment="Center" />
+      <Button 
+        x:Name="TopButton"
+        ImageSource="dotnet_bot.png" 
+        Text="Button 2"
+        TextColor="Black"
+        ContentLayout="Top, 20" 
+        Background="LightGray"/>
+      <BoxView 
+        HeightRequest="30"/>
+      <Label 
+        Text="Image on Left" 
+        HorizontalTextAlignment="Center" />
+      <Button 
+        x:Name="LeftButton"
+        ImageSource="dotnet_bot.png" 
+        Text="Button 3"
+        TextColor="Black"
+        ContentLayout="Left, 20" 
+        Background="LightGray"/>
+      <BoxView 
+        HeightRequest="30"/>
+      <Label 
+        Text="Image on Right"
+        HorizontalTextAlignment="Center" />
+      <Button 
+        x:Name="RightButton"
+        ImageSource="dotnet_bot.png" 
+        Text="Button 4"
+        TextColor="Black"
+        ContentLayout="Right, 20" 
+        Background="LightGray"/>
+      <BoxView 
+        HeightRequest="30"/>
+      <Label 
+        Text="Button Padding"/>
+      <Slider 
+        Minimum="0"
+        Maximum="40"
+        Value="20"
+        ValueChanged="OnSliderPaddingValueChanged"/>
+      <Label
+        Text="Button Size"/>
+      <Button
+        Text="Update Button Size"
+        Clicked="OnUpdateSizeButtonClicked"/>
+    </VerticalStackLayout>
+  </ScrollView>
+</ContentPage>

src/Controls/samples/Controls.Sample.UITests/Issues/Issue18242_2.xaml.cs

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+using System;
+using Microsoft.Maui;
+using Microsoft.Maui.Controls;
+using Microsoft.Maui.Controls.Xaml;
+
+namespace Maui.Controls.Sample.Issues
+{
+	[XamlCompilation(XamlCompilationOptions.Compile)]
+	[Issue(IssueTracker.ManualTest, "18242_2", "Button ImageSource not Scaling as expected", PlatformAffected.iOS)]
+	public partial class Issue18242_2 : ContentPage
+	{
+		readonly Random _random;
+
+		public Issue18242_2()
+		{
+			InitializeComponent();
+
+			_random = new Random();
+		}
+
+		void OnSliderPaddingValueChanged(object sender, ValueChangedEventArgs e)
+		{
+			TopButton.Padding = 
+			BottonButton.Padding = 
+			LeftButton.Padding = 
+			RightButton.Padding = new Thickness(e.NewValue);
+		}
+
+		void OnUpdateSizeButtonClicked(object sender, EventArgs e)
+		{
+			TopButton.HeightRequest = TopButton.WidthRequest =
+			BottonButton.HeightRequest = BottonButton.WidthRequest =
+			LeftButton.HeightRequest = LeftButton.WidthRequest =
+			RightButton.HeightRequest = RightButton.WidthRequest =
+			_random.Next(200, 300);
+		}
+	}
+}