Download a copy of a build artifact into a file or directory. Uses same parameters and logic as getArtifactList for identifying build result artifacts to search. For artifacts that represent a directory, specify an existing directory or use '--options mkdir' to create the directory path to download all files for the artifact. Otherwise, the html for the artifact will be downloaded to the file. Alternatively, use the artifact name plus the path to the file in the artifact to get a single artifact file.