executor: fix data race in TestAnalyzeFastSample (#13130)
executor: fix data race in TestAnalyzeFastSample (#13130)


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