ddl: make the SyncerSessionTTL smaller (#10371)
ddl: make the SyncerSessionTTL smaller (#10371)


qiuyesuifeng/tidb,c4pt0r/tidb,c4pt0r/tidb,Cofyc/tidb,pingcap/tidb,coocood/tidb,kyle-wang/tidb,kyle-wang/tidb,kyle-wang/tidb,kyle-wang/tidb,pingcap/tidb,kyle-wang/tidb,c4pt0r/tidb,ngaut/tidb,cosmtrek/tidb,qiuyesuifeng/tidb,pingcap/tidb,XuHuaiyu/tidb,coocood/tidb,pingcap/tidb,ngaut/tidb,XuHuaiyu/tidb,ngaut/tidb,c4pt0r/tidb,c4pt0r/tidb,ngaut/tidb,c4pt0r/tidb,ming-relax/tidb,Cofyc/tidb,ngaut/tidb,EvilMcJerkface/tidb,ngaut/tidb,cosmtrek/tidb,ming-relax/tidb,pingcap/tidb,EvilMcJerkface/tidb,pingcap/tidb,kyle-wang/tidb