session, test: make `TestClusteredIndexSyntax` stable (#27045)
session, test: make `TestClusteredIndexSyntax` stable (#27045)

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