executor: Let the SHUTDOWN statement do a graceful shutdown (#25673)
executor: Let the SHUTDOWN statement do a graceful shutdown (#25673)

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