[CI] Move nightly-a2 test to hk (#5807)

### What this PR does / why we need it?
This patch initial testing involved connecting two nodes from the HK
region to nightly A2.

- vLLM version: v0.13.0
- vLLM main:
2f4e6548ef

---------

Signed-off-by: wangli <wangli858794774@gmail.com>

tests/e2e/nightly/multi_node/scripts/run.sh

@@ -167,8 +167,8 @@ run_tests_with_log() {
         if [ $ret -eq 0 ]; then
             print_success "All tests passed!"
         else
-            print_failure "Some tests failed, please check the error stack above for details.\
-            If this is insufficient to pinpoint the error, please download and review the logs of all other nodes from the job's summary."
+            print_failure "Some tests failed, please check the error stack above for details. \
+If this is insufficient to pinpoint the error, please download and review the logs of all other nodes from the job's summary."
         fi
     fi
 }