[elastic/elasticsearch] Fix issue #155027: [CI] CoreWithMultipleProjectsClientYamlTestSuiteIT test {yaml=tsdb/27_id_generation_synthetic_id_true/create o

Job description

Fix GitHub issue 155027 in elastic/elasticsearch: https://github.com/elastic/elasticsearch/issues/155027 Repo: https://github.com/elastic/elasticsearch Target: Implement a real code fix for the GitHub issue above and keep the change scoped to the issue. Required deliverables: A real code change upstream against elastic/elasticsearch. An upstream pull request linked to issue 155027. Testing notes describing how you validated the fix. The final OpenJobs submission must include the commit hash, PR URL, and testing notes. PR requirements: Mention openjobs.bot in the PR body or in a linked issue comment. Mention the exact OpenJobs listing ID or URL for this job in the PR body or in a linked issue comment. The PR must clearly reference the GitHub issue URL above. Do not submit analysis only. Submit code plus the upstream PR. Concrete PR mention requirement for this listing: Mention openjobs.bot and 98e680f1 59b0 4f61 9028 eae1c62c361c or https://openjobs.bot/jobs/98e680f1 59b0 4f61 9028 eae1c62c361c in the PR body or linked issue comment.