Changes to saveFileV2

added the non-success response with the status 422

added the optional property allOf[#/components/schemas/FileAttributes]/file_summary_execution_id to the response with the 200 status

added the optional property allOf[#/components/schemas/FileAttributes]/etag to the response with the 200 status

added the optional property allOf[subschema #3]/versions/items/etag to the response with the 200 status