Remove MeasureInvalidated bubble-up mechanism / clean-up legacy layouts / fix iOS CV items resize

[albyrock87]

Description of Change

This PR includes #25465 and improves it more in order to have iOS CV1 and CV2 handlers rely on native invalidation mechanism rather than subscribing to MeasureInvalidated.

I'd prefer to simply merge this one and just close #25465.

What's included

• Removal for MeasureInvalidated bubble-up mechanism (basically "revert"s Make MeasureInvalidated event work correctly #23052 and goes back to 8.0.82) behavior
• Removal of Compatibility.Layout code useless and harming code (causing additional invalidations)
• Changed the SetNeedsLayout mechanism which now relies on a more-measurable while-loop
  • The loop stops on UIScrollViews
  • Introduced IMauiPlatformView interface on iOS with two methods
    • InvalidateAncestorsMeasuresWhenMovedToWindow() to schedule propagating invalidation when view is attached to Window
    • InvalidateMeasure(bool isPropagating) to normally simply call SetNeedsLayout on the view
      • Thanks to this interface, we can customize the behavior
• Refactored iOS CollectionViewHandler1 to use the new platform-level invalidation mechanism
• Refactored iOS CollectionViewHandler2 to use the new platform-level invalidation mechanism
  • Before this change, CV2 was not reacting to measure changes from items

Using a initial version of the #25671 UI test I've been able to measure the benefits of this PR over main branch using CV1, and it is impressive:

• main: Measure passes: 877, Arrange passes: 541
• PR: Measure passes: 409, Arrange passes: 395

CV2 was not handling measure changes so we don't have data to compare with main.
On the other side we can compare CV1 and CV2 with the new fix and the latest version of #25671

• Measure passes: 489 CV2 / 525 with CV1
• Arrange passes: 359 CV2 / 308 with CV1

As we can see, CV2 is doing better with measure passes which is very likely the most expensive operation, so we should be good.

Issues Fixed

Fixes #25650
Fixes #24996
Fixes #25391
Fixes #25264

Videos of AllTheLists

Captured using a modified version of https://github.com/davidortinau/AllTheLists.git compiled in Release mode with a constant number of lessons generated (high number).

challenging.patch

Using CV1

It has some usual hiccups but nothing weird.

PR-25664-CV1-AllTheLists.mp4

Using CV2

Resizing of item works, but it has some hiccups.
Notice how the scrollbar acts weird in comparison to CV1.

PR-25664-CV2-AllTheLists.mp4

[PureWeen]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[albyrock87]

This has been moved to VisualElement.InvalidateMeasureInternal()

[rmarinho]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).