[8.x] ESQL: Fix EsqlNodeSubclassTest failure from mutating (#125503)#125513

elasticsearchmachine merged 1 commit intoelastic:8.xelastic/elasticsearch:8.xfrom

alex-spies:backport/8.x/pr-125503alex-spies/elasticsearch:backport/8.x/pr-125503Copy head branch name to clipboard