Remove code from iOS that short circuits propagation

[PureWeen]

Description of Change

https://github.com/dotnet/maui/pull/24217 added some code that guessed at a few paths that might be taken to cause https://github.com/dotnet/maui/issues/24032 since we've been unable to reproduce this locally.

I'm hoping that the fixes on 24217 related to not disposing the view on the UINavigationController covers everyones cases and we can just leave this propagation code in place for now.

If users still report the crash then we'll need to figure out how to more surgically propagate invalidations on iOS.

Issues Fixed

Fixes #24434