[Backport 2.19-dev] Pushdown case function in aggregations as range queries (#4400)#4630

qianheng-aws merged 3 commits intoopensearch-project:2.19-devopensearch-project/sql:2.19-devfrom

yuancu:backport/backport-4400-to-2.19-devyuancu/sql-plugin:backport/backport-4400-to-2.19-devCopy head branch name to clipboard