[12.x] Remove commented parameters and type declations in NodeTypeInterface

Problem/Motivation

Follow up to 📌 Introduce and make use of NodePreview enum, to replace node related usage of DRUPAL_DISABLED, DRUPAL_OPTIONAL and DRUPAL_REQUIRED constants Active

As per Adding arguments to interface methods → we have added commented out parameters and type declarations to the following methods

\Drupal\node\NodeTypeInterface::getPreviewMode
\Drupal\node\NodeTypeInterface::setPreviewMode

Steps to reproduce

Proposed resolution

Uncomment parameter from ::getPreviewMode
Uncomment type declaration from ::setPreviewMode

Note that support for deprecated use of ints will remain throughout Drupal 12, and will be removed in Drupal 13.

Remaining tasks

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet