[Backport 2.19-dev]Separate explain mode from format params (#5042)#5046

LantaoJin merged 1 commit intoopensearch-project:2.19-devopensearch-project/sql:2.19-devfrom

qianheng-aws:backport/backport-5042-to-2.19-devqianheng-aws/sql:backport/backport-5042-to-2.19-devCopy head branch name to clipboard