[#24903] Fix Type error in DynamicStorage

[BrentRobert]

Description (*)

This fixes the Uncaught TypeError: Return value of Magento\CatalogUrlRewrite\Model\Storage\DynamicStorage::getCategoryUrlSuffix() must be of the type string, null returned
When the suffix is removed you'll have a null value in the database.

Fixed Issues (if relevant)

1. [Magento 2.3.3] Uncaught TypeError: Return value of Magento\CatalogUrlRewrite\Model\Storage\DynamicStorage::getCategoryUrlSuffix() must be of the type string, null returned #24903: Uncaught TypeError: Return value of Magento\CatalogUrlRewrite\Model\Storage\DynamicStorage::getCategoryUrlSuffix() must be of the type string, null returned

Manual testing scenarios (*)

None

Questions or comments

None

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)

[m2-assistant]

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[engcom-Delta]

✔️ QA passed

[m2-assistant]

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[VladimirZaets]

Covered in the scope of #25915