Usage
bqr_copy_dataset(source_datasetid, destination_datasetid,
source_projectid = bqr_get_global_project(),
destination_projectid = bqr_get_global_project(),
createDisposition = c("CREATE_IF_NEEDED", "CREATE_NEVER"),
writeDisposition = c("WRITE_TRUNCATE", "WRITE_APPEND", "WRITE_EMPTY"),
destination_prefix = NULL)