Drupal 9.3 fixes and PHP 8.1

Problem/Motivation

The warning is thrown if no icon uuid is set.

Deprecated function: addcslashes(): Passing null to parameter #1 ($string) of type string is deprecated in Drupal\Core\Database\Connection->escapeLike() (line 1483 of core/lib/Drupal/Core/Database/Connection.php).

Drupal\Core\Database\Connection->escapeLike(NULL) (Line: 418)
Drupal\Core\Database\Query\Select->escapeLike(NULL) (Line: 118)
Drupal\Core\Entity\Query\Sql\Condition::translateCondition(Array, Object, ) (Line: 63)
Drupal\Core\Entity\Query\Sql\Condition->compile(Object) (Line: 176)
Drupal\Core\Entity\Query\Sql\Query->compile() (Line: 80)
Drupal\Core\Entity\Query\Sql\Query->execute() (Line: 43)
Drupal\paragraphs\ParagraphsTypeIconUuidLookup->resolveCacheMiss(NULL) (Line: 149)
Drupal\Core\Cache\CacheCollector->get(NULL) (Line: 295)
Drupal\paragraphs\Entity\ParagraphsType->getFileByUuid(NULL) (Line: 162)
Drupal\paragraphs\Entity\ParagraphsType->getIconFile() (Line: 184)
Drupal\paragraphs\Entity\ParagraphsType->getIconUrl() (Line: 1620)
Drupal\paragraphs\Plugin\Field\FieldWidget\ParagraphsWidget->buildButtonsAddMode() (Line: 1425)
Drupal\paragraphs\Plugin\Field\FieldWidget\ParagraphsWidget->buildAddActions() (Line: 1200)
Drupal\paragraphs\Plugin\Field\FieldWidget\ParagraphsWidget->formMultipleElements(Object, Array, Object) (Line: 111)
Drupal\Core\Field\WidgetBase->form(Object, Array, Object, NULL) (Line: 1225)
Drupal\paragraphs\Plugin\Field\FieldWidget\ParagraphsWidget->form(Object, Array, Object) (Line: 181)
Drupal\Core\Entity\Entity\EntityFormDisplay->buildForm(Object, Array, Object) (Line: 121)
Drupal\Core\Entity\ContentEntityForm->form(Array, Object) (Line: 127)
Drupal\node\NodeForm->form(Array, Object) (Line: 106)
Drupal\Core\Entity\EntityForm->buildForm(Array, Object)
call_user_func_array(Array, Array) (Line: 531)
Drupal\Core\Form\FormBuilder->retrieveForm('node_article_form', Object) (Line: 278)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 97)
Drupal\autosave_form\Form\AutosaveFormBuilder->buildForm(Object, Object) (Line: 73)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 564)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 158)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 80)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 49)
Asm89\Stack\Cors->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
require('/Users/d430774/Sites/thunder/thunder-develop/docroot/index.php') (Line: 235)