fix(cdk/drag-drop): Support for nested drop containers #32525
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Fixes a two issues:
The first fixed issue is that the elements of cdkDropListConnectedTo previously had to be ordered correctly to support moving items into an inner drop container. Sepcifically, inner drop containers had to be listed before their outer ancestors.
The second fixed issue is that items of an inner container could not be re-ordered without moving the item out of the container and then back in.
Fixes #16671