PHP8.4 compatibility

Problem/Motivation

Using PHP8.4 I am seeing some deprecation warnings, with drupal/panels and drupal/page_manager:

// Panels

Deprecated function: Drupal\panels\Form\PanelsAddBlockForm::buildForm(): Implicitly marking parameter $request as nullable is deprecated, the explicit nullable type must be used instead in include() (line 576 of /var/www/vendor/composer/ClassLoader.php).

Deprecated function: Drupal\panels\Storage\PanelsStorageManager::access(): Implicitly marking parameter $account as nullable is deprecated, the explicit nullable type must be used instead in include() (line 576 of /var/www/vendor/composer/ClassLoader.php).

Deprecated function: Drupal\panels\Storage\PanelsStorageManagerInterface::access(): Implicitly marking parameter $account as nullable is deprecated, the explicit nullable type must be used instead in include() (line 576 of /var/www/vendor/composer/ClassLoader.php).

Deprecated function: Drupal\panels\Plugin\DisplayVariant\PanelsDisplayVariant::access(): Implicitly marking parameter $account as nullable is deprecated, the explicit nullable type must be used instead in include() (line 576 of /var/www/vendor/composer/ClassLoader.php).


// Page manager

Deprecated function: Drupal\page_manager\Entity\PageVariantViewBuilder::resetCache(): Implicitly marking parameter $entities as nullable is deprecated, the explicit nullable type must be used instead in include() (line 576 of /var/www/vendor/composer/ClassLoader.php).

Deprecated function: Drupal\page_manager\Plugin\SectionStorage\PageManagerSectionStorage::access(): Implicitly marking parameter $account as nullable is deprecated, the explicit nullable type must be used instead in include() (line 576 of /var/www/vendor/composer/ClassLoader.php).

Deprecated function: Drupal\page_manager_ui\Form\VariantPluginAddBlockForm::buildForm(): Implicitly marking parameter $request as nullable is deprecated, the explicit nullable type must be used instead in include() (line 576 of /var/www/vendor/composer/ClassLoader.php).

Steps to reproduce

1. Install Drupal WxT 6.2.x/6.3.x.
2. Upgrade the PHP runtime to PHP 8.4.
3. Clear caches via the UI or with Drush.
4. Observe the deprecation notices above.

Proposed resolution

Apply patches from two related tickets.