tests: isolate TiDB slow-query logs in next-gen tests#5816

tenfyzhong wants to merge 1 commit into

pingcap:masterpingcap/ticdc:masterfrom

tenfyzhong:fix/5814-unique-tidb-slow-logstenfyzhong/ticdc:fix/5814-unique-tidb-slow-logsCopy head branch name to clipboard