Revert usage on <ListIterator> in ra-ui-materialui

[djhi]

Fixes #10900

Problem

Using <ListIterator> in ra-ui-materialui introduced regressions.

Solution

As we're in the process of rewriting <ListIterator> in ra-core, we chose to revert those changes for now.

How To Test

• Current tests should work as before
• Added a test on <SingleFieldList> to detect regressions

Additional Checks

• The PR targets master for a bugfix or a documentation fix, or next for a feature
• The PR includes unit tests (if not possible, describe why)
• The documentation is up to date

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