[FEATURE] Provide a trait to support public access deprecation

Provides a trait to leverage a smooth migration of public
property access to protected. For the period of deprecation
the access to the protected property is still possible and is
logged by the deprecation log. A unit test is included.

Resolves: #81330
Releases: master
Change-Id: I6293e460053eb38a633271ec877b3bc9a8527342
Reviewed-on: https://review.typo3.org/52928


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>