[0.8] exit if bm_files.sh input is not one of the expected inputs (#498)

exit if bm_files.sh input is not one of the expected inputs (#495)

* exit if bm_files.sh input is bm-spaces

* exit if no file

* exit

(cherry picked from commit 8ed43ab)

Co-authored-by: meiravgri <109056284+meiravgri@users.noreply.github.com>

Author: github-actions[bot]

tests/benchmark/bm_files.sh

@@ -1,8 +1,6 @@
 BM_TYPE=$1
 if [ -z "$BM_TYPE"  ] || [ "$BM_TYPE" = "benchmarks-all" ]; then
     file_name="all"
-elif [ "$BM_TYPE" = "bm-spaces" ]; then
-    :
 elif [ "$BM_TYPE" = "benchmarks-default" ] \
 || [ "$BM_TYPE" = "bm-basics-fp32-single" ] \
 || [ "$BM_TYPE" = "bm-basics-fp32-multi" ] \
@@ -30,6 +28,9 @@ then
     file_name="basic_fp16"
 elif [ "$BM_TYPE" = "bm-updated-fp32-single" ]; then
     file_name="updated"
+else
+    echo "No files to download for BM_TYPE=$BM_TYPE"
+    exit 0
 fi
 
 cat tests/benchmark/data/hnsw_indices/hnsw_indices_$file_name.txt | xargs -n 1 -P 0 wget --no-check-certificate -P tests/benchmark/data