Remove AdobeStockImage dependency

[alinalexandru]

When extending an XML file, there is no need to copy existing setting. Even though Adobe Stock Image is now part of magento default meta-package, It can be removed in order to increase magento performance.

<columns name="media_gallery_columns"> is already defined in https://github.com/magento/adobe-stock-integration/blob/develop/AdobeStockImageAdminUi/view/adminhtml/ui_component/media_gallery_listing.xml and there is no need to have those settings in the cloudinary module.

With this PR, the magento2 module will work correctly no mather if Adobe Stock Image module exists or not.