Changes to Unpublish one or many articles from a CMS provider

added the new optional request property afterId

added the new optional request property selection

added subschema #3 to the allOf[subschema #1] request property oneOf list

added the optional property eligibility to the response with the 200 status

added the optional property nextCursor to the response with the 200 status

added the optional property cmsUnpublishError to the response with the 200 status

added the optional property results/items/cmsUnpublishError to the response with the 200 status

added the non-success response with the status 409

added the new embed enum value to the request property items/items/provider

added the new embed enum value to the request property provider

added subschema #1 to the request body allOf list

removed subschema #1 subschema #2 from the request body oneOf list

added the new grigora enum value to the request property items/items/provider

added the new grigora enum value to the request property provider