chore: import upstream snapshot with attribution

tests/scripts/task_dist_test.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+function fail {
+    echo FAIL: $@
+    exit -1
+}
+
+echo $PWD
+export DGLBACKEND=pytorch
+export DGL_LIBRARY_PATH=${PWD}/build
+export PYTHONPATH=${PWD}/tests:${PWD}/python:$PYTHONPATH
+export LD_LIBRARY_PATH=${PWD}/build:$LD_LIBRARY_PATH
+export DIST_DGL_TEST_CPP_BIN_DIR=${PWD}/build
+export DIST_DGL_TEST_IP_CONFIG=/home/ubuntu/workspace/ip_config.txt
+export DIST_DGL_TEST_PY_BIN_DIR=${PWD}/tests/dist/python
+
+if [[ -v DIST_DGL_TEST_SSH_PORT ]]; then
+    SSH_PORT_LINE="-p $DIST_DGL_TEST_SSH_PORT";
+fi
+
+if [[ -v DIST_DGL_TEST_SSH_KEY ]]; then
+    SSH_KEY_LINE="-i $DIST_DGL_TEST_SSH_KEY";
+fi
+
+if [[ -v DIST_DGL_TEST_SSH_SETUP ]]; then
+    SSH_SETUP_LINE="$DIST_DGL_TEST_SSH_SETUP;";
+fi
+
+
+while IFS= read line
+do
+    for pkg in 'pytest' 'psutil' 'torch'
+    do
+        ret_pkg=$(ssh -o StrictHostKeyChecking=no ${line} ${SSH_PORT_LINE} ${SSH_KEY_LINE} "${SSH_SETUP_LINE}python3 -m pip list | grep -i ${pkg} ") || fail "${pkg} not installed in ${line}"
+    done
+done < ${DIST_DGL_TEST_IP_CONFIG}
+
+python3 -m pytest -v --capture=tee-sys --junitxml=pytest_dist.xml --durations=100 tests/dist/test_*.py || fail "dist across machines"