Migrate from Xamarin.Forms ProgressBar to .NET MAUI ProgressBar

Overall, Telerik .NET MAUI ProgressBar control preserves the same API as Xamarin.Forms ProgressBar with a few changes and improvements listed in the table below:

Xamarin ProgressBar	.NET MAUI ProgressBar
IndeterminateFill	ProgressFill
-	ProgressCornerRadius
-	TrackCornerRadius
-	TrackThickness