Breaking: #67229 - FormEngine related classses 

Description 

With the further development of FormEngine, some minor changes on PHP level have been applied:

• Class TYPO3CMST3editorFormWizard has been removed
• Class TYPO3CMSRtehtmlareaControllerFrontendRteController has been removed
• The method signature of class TYPO3CMSUtilityBackendUtility method getSpecConfParts has changed

Impact 

Using code will fatal or not be called any longer.

Affected Installations 

If extensions use above classes or methods. Since these classes are mostly core internal it is quite unlikely any project in the wild is affected.

Migration 

Use the newly introduced API.