[9.0] Aggs: Add validation to Bucket script pipeline agg (#132320)#132441

elasticsearchmachine merged 1 commit intoelastic:9.0elastic/elasticsearch:9.0from

ivancea:backport-9.0-aggs-fix-bucket-scriptivancea/elasticsearch:backport-9.0-aggs-fix-bucket-scriptCopy head branch name to clipboard