Update run_mac_test.sh (#73289)

* Update run_mac_test.sh

Author: tianshuo78520a

ci/run_mac_test.sh

@@ -197,7 +197,6 @@ EOF
                         echo "The following unittest will be re-run:"
                         echo "${retry_unittests}"
                         echo "========================================="
-
                         retry_unittests_regular=''
                         for line in ${retry_unittests[@]} ;
                             do
@@ -207,7 +206,7 @@ EOF
                                     retry_unittests_regular="$retry_unittests_regular|^$line$"
                                 fi
                             done
-			find $tmp_dir -delete
+			find $tmp_dir -mindepth 1 -delete
                         failed_test_lists=''
                         ctest -R "($retry_unittests_regular)" --output-on-failure -j 4 | tee $tmpfile
                         collect_failed_tests