Breaking: #75497 - inline backend layout wizard

See forge#75497

Description

The BackendLayoutWizardController has been removed and a new renderType has been added to render the backend layout wizard inline in FormEngine.

Also the backend route wizard_backend_layout has been removed.

Impact

Extending or using the BackendLayoutWizardController will break installations.

Affected Installations

Any installation which uses an extension which makes use of BackendLayoutWizardController

Migration

Use the renderType belayoutwizard, which renders the backend layout wizard inline in FormEngine.