Flaky test TestShowViewPriv

[tangenta]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

    result.go:49: 
        	Error Trace:	pkg/testkit/result.go:49
        	            				pkg/privilege/privileges/privileges_test.go:372
        	Error:      	Not equal: 
        	            	expected: "[1]\n"
        	            	actual  : "[0]\n"
        	            	
        	            	Diff:
        	            	--- Expected
        	            	+++ Actual
        	            	@@ -1,2 +1,2 @@
        	            	-[1]
        	            	+[0]
        	            	 
        	Test:       	TestShowViewPriv
        	Messages:   	sql:select count(*) from information_schema.tables where table_schema='test' and table_name='v', args:[]

2. What did you expect to see? (Required)

No error.

3. What did you see instead (Required)

4. What is your TiDB version? (Required)

487ef06

[tiancaiamao]

Introduced by #55574