[iOS] Investigate if MauiCALayer needs to use a weakreference for the IShape

[PureWeen]

Description

We should confirm this a bit more

		[UnconditionalSuppressMessage("Memory", "MEM0002", Justification = "IShape is a non-NSObject in MAUI.")]
		IShape? _shape;

You might get some shapes that inherit from View and those will have Handlers and NSObjects associated with them

public sealed partial class RoundRectangle : Shape, IShape, IRoundRectangle

Reproduction

Haven't been ablet to reproduce as of yet.
From what I can tell everything is collecting without any issues.

I've just seen some signs of lingering in larger apps but still need to narrow down if this is a culprit

[reid-kirkpatrick]

@PureWeen we're seeing memory leaks in our app that seem to point back to MauiCALayer. This screenshot is after navigating back from a page and running a GC.Collect(). Thoughts?

edit: I just realized that our SectionIndicatorView is one of the only RoundRectangles we have the CornerRadius bound to a value instead of hard coded. And it is the only view that does so on the page in question

edit 2: Can confirm that for us, removing the binding for RoundRectangle.CornerRadius and using a static value fixed our memory leaks

[PureWeen]

@PureWeen we're seeing memory leaks in our app that seem to point back to MauiCALayer. This screenshot is after navigating back from a page and running a GC.Collect(). Thoughts?

edit: I just realized that our SectionIndicatorView is one of the only RoundRectangles we have the CornerRadius bound to a value instead of hard coded. And it is the only view that does so on the page in question

edit 2: Can confirm that for us, removing the binding for RoundRectangle.CornerRadius and using a static value fixed our memory leaks

Can you create a repro?

I attempted to fix this issue but couldn't reproduce the issue so didn't want to just change it without proof

[reid-kirkpatrick]

I'm struggling to reproduce this in a sample project @PureWeen. When I get some more time, hopefully later this week, I'll keep pulling things from our app into the sample and see if I can get you a repro.