server: change dispatch failed log to info level (#19217)
server: change dispatch failed log to info level (#19217)

Signed-off-by: Shuaipeng Yu <062c5783aef2bf2e1ece2d8d837edacc2952e763@gmail.com>
coocood/tidb,c4pt0r/tidb,EvilMcJerkface/tidb,c4pt0r/tidb,kyle-wang/tidb,c4pt0r/tidb,ngaut/tidb,pingcap/tidb,kyle-wang/tidb,c4pt0r/tidb,c4pt0r/tidb,XuHuaiyu/tidb,pingcap/tidb,XuHuaiyu/tidb,pingcap/tidb,ngaut/tidb,pingcap/tidb,pingcap/tidb,ngaut/tidb,ngaut/tidb,kyle-wang/tidb,kyle-wang/tidb,c4pt0r/tidb,EvilMcJerkface/tidb,kyle-wang/tidb,pingcap/tidb,coocood/tidb,ngaut/tidb,ngaut/tidb,kyle-wang/tidb