Pass test data path

Author: pwrliang

.github/workflows/run-gpu-join.yml

@@ -141,7 +141,7 @@ jobs:
           for test_exec in test/*; do
             if [[ -f "$test_exec" && -x "$test_exec" ]]; then
               echo "--- Running ${test_exec} ---"
-              "$test_exec"
+              GPUSPATIAL_TEST_DIR=$GPUSPATIAL_TEST_DIR "$test_exec"
             fi
           done