Merge pull request #37857 from ixdy/log-dump-fix

Automatic merge from submit-queue

Fix conditional in log-dump.sh

I think a `-n` was unintentionally changed to a `-z` in #37646, [here](a1bd743118 (commitcomment-20039393)), which caused us to stop collecting master/node logs. This undoes that change.

cc @zmerlynn @spxtr @krzyzacy @jingxu97 @saad-ali

cluster/log-dump.sh

@@ -68,7 +68,7 @@ function setup() {
 }
 
 function log-dump-ssh() {
-  if [[ -n "${use_custom_instance_list}" ]]; then
+  if [[ -z "${use_custom_instance_list}" ]]; then
     ssh-to-node "$@"
     return
   fi