cmd/ddltest: change the default log level to fatal in ddltest (#16922)
cmd/ddltest: change the default log level to fatal in ddltest (#16922)


kyle-wang/tidb,pingcap/tidb,pingcap/tidb,XuHuaiyu/tidb,EvilMcJerkface/tidb,kyle-wang/tidb,c4pt0r/tidb,c4pt0r/tidb,ngaut/tidb,ngaut/tidb,ngaut/tidb,ngaut/tidb,XuHuaiyu/tidb,pingcap/tidb,pingcap/tidb,c4pt0r/tidb,coocood/tidb,ngaut/tidb,c4pt0r/tidb,kyle-wang/tidb,c4pt0r/tidb,kyle-wang/tidb,coocood/tidb,c4pt0r/tidb,pingcap/tidb,EvilMcJerkface/tidb,pingcap/tidb,kyle-wang/tidb,ngaut/tidb,kyle-wang/tidb