New rendition adapter async behavior expects input document to hold a blob

NXP-31855 breaks renditions if the document doesn't have the file schema, which is not a requirement in the legacy behavior.

For example, I have a document type which doesn't have the file schema but still has the thumbnail one. using the rest adapter @rendition/thumbnail now fails with the following error:

org.nuxeo.ecm.webengine.model.exceptions.IllegalParameterException: No blob holder for doc: DocumentModelImpl

Works fine with the legacy behavior nuxeo.rendition.legacy.enabled=true

No blobholder
https://github.com/nuxeo/nuxeo-lts/blob/398d3d6e616133df93fc0a6a32c0e599aa0b3c48/m[…]n/java/org/nuxeo/ecm/platform/rendition/work/RenditionWork.java
should be treated as not blob
https://github.com/nuxeo/nuxeo-lts/blob/398d3d6e616133df93fc0a6a32c0e599aa0b3c48/m[…]n/java/org/nuxeo/ecm/platform/rendition/work/RenditionWork.java