store: reduce time of ConnTestSuite.TestTiFlashFallback (#26659)
store: reduce time of ConnTestSuite.TestTiFlashFallback (#26659)

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