Feature: #85247 - Trait to detect public deprecated methods

Description

The trait \TYPO3\CMS\Core\Compatibility\PublicMethodDeprecationTrait has been added to allow setting public methods to protected in a backwards compatible way.

The core uses this trait to set public methods that should be protected or private but are accessible code wise for historical reasons, while extensions using the methods do not break, but a PHP E_USER_DEPRECATED error is triggered.

Classes using this trait have a property $deprecatedPublicMethods that lists all methods covered by the trait.

Impact

Core classes using this trait trigger PHP E_USER_DEPRECATED errors if an extension uses a method that has been made protected using the trait functionality.