Evaluate New Form Validation in Flutter 3.22.0

[tomarra]

Is your feature request related to a problem? Please describe. With the release of Flutter 3.22 there are new form validation methods available. We should review these and see if there are any updates needed in the package implementation wise or example wise to stay up to date.

Describe alternatives you've considered None

Additional context Pull request where the new support was added https://github.com/flutter/flutter/pull/135578