Add tpcds-100 downloader (#5100)

Author: resetius

ydb/library/benchmarks/runner/download_files_ds_100.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+set -eux
+if [ ! -d tpc/ds/100 ]; then
+mkdir -p tpc/ds/100
+fi
+
+b=`pwd`
+cd tpc/ds/100
+
+base=https://storage.yandexcloud.net/tpc/ds/s100/parquet
+
+source $b/download_lib.sh
+source $b/download_tpcds_tables.sh
+