unstable test TestOrderByAndLimit

[hawkingrei]

Bug Report

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     result.go:49: 
        	Error Trace:	testkit/result.go:49
        	            				executor/partition_table_test.go:602
        	Error:      	Not equal: 
        	            	expected: "[1025 1127]\n"
        	            	actual  : "[534 1127]\n"
        	            	
        	            	Diff:
        	            	--- Expected
        	            	+++ Actual
        	            	@@ -1,2 +1,2 @@
        	            	-[1025 1127]
        	            	+[534 1127]
        	            	 
        	Test:       	TestOrderByAndLimit
        	Messages:   	sql:select /*+ LIMIT_TO_COP() */ * from tlist use index(idx_b) where b > 1126 and b < greatest(1127+1, 1127) order by b limit 1, args:[] 

https://tiprow.hawkingrei.com/view/gs/pingcapprow/pr-logs/pull/pingcap_tidb/45493/tiprow_fast_test/1682257303933292544

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