Use different Webdam API when thumbnail download is failed

Problem/Motivation

AcquiadamAsset::getThumbnailUrlBySize() returns FALSE if it fails to download the 1280 size thumbnail.

Proposed resolution

Use a different Webdam API to generate the thumbnail. Lets use the same API that has been used here #3005252-2: Add support of 1600 image size limit → .

Remaining tasks

N/A

User interface changes

A new option 1600 will be available under Image size limit configuration.

API changes

A new API function will be available generateAssetThumbnail($asset_id, $width, $height) which will use the WebDam API /ws/assets/asset_id/thumbnail. The new API will be able to generate asset of the provided size.

Data model changes

N/A