executor: add integration test cases for HashAggExec, StreamAggExec, IndexReader and IndexLookup (#15104)
executor: add integration test cases for HashAggExec, StreamAggExec, IndexReader and IndexLookup (#15104)


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