Php 8.4 Deprecations

Problem/Motivation

Deprecated: Drupal\moderation_sidebar\Form\QuickTransitionForm::__construct(): Implicitly marking parameter $datetime as nullable is deprecated, the explicit nullable type must be used instead in /opt/drupal/web/modules/contrib/moderation_sidebar/src/Form/QuickTransitionForm.php on line 74
Deprecated: Drupal\moderation_sidebar\Form\QuickTransitionForm::buildForm(): Implicitly marking parameter $entity as nullable is deprecated, the explicit nullable type must be used instead in /opt/drupal/web/modules/contrib/moderation_sidebar/src/Form/QuickTransitionForm.php on line 110

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes