TestConfigTestSuite is unstable

[lhy1024]

Flaky Test

Which jobs are failing

2023-11-20T07:54:14.7381646Z --- FAIL: TestConfigTestSuite (61.17s)
2023-11-20T07:54:14.7381949Z     --- FAIL: TestConfigTestSuite/TestPDServerConfig (9.26s)
2023-11-20T07:54:14.7382230Z         testutil.go:264: start to run test in pd mode
2023-11-20T07:54:14.7382493Z         testutil.go:268: finish to run test in pd mode
2023-11-20T07:54:14.7382754Z         testutil.go:273: start to run test in api mode
2023-11-20T07:54:14.7382924Z         config_test.go:847: 
2023-11-20T07:54:14.7383645Z             	Error Trace:	/home/runner/work/pd/pd/tests/pdctl/config/config_test.go:847
2023-11-20T07:54:14.7384231Z             	            				/home/runner/work/pd/pd/tests/testutil.go:277
2023-11-20T07:54:14.7385029Z             	            				/home/runner/work/pd/pd/tests/testutil.go:259
2023-11-20T07:54:14.7386233Z             	            				/home/runner/work/pd/pd/tests/pdctl/config/config_test.go:820
2023-11-20T07:54:14.7386601Z             	Error:      	Not equal: 
2023-11-20T07:54:14.7387095Z             	            	expected: "auto"
2023-11-20T07:54:14.7387790Z             	            	actual  : "http://127.0.0.1:39661"
2023-11-20T07:54:14.7388064Z             	            	
2023-11-20T07:54:14.7388263Z             	            	Diff:
2023-11-20T07:54:14.7388589Z             	            	--- Expected
2023-11-20T07:54:14.7389022Z             	            	+++ Actual
2023-11-20T07:54:14.7389525Z             	            	@@ -1 +1 @@
2023-11-20T07:54:14.7389957Z             	            	-auto
2023-11-20T07:54:14.7390551Z             	            	+http://127.0.0.1:39661
2023-11-20T07:54:14.7391156Z             	Test:       	TestConfigTestSuite/TestPDServerConfig

CI link

https://github.com/tikv/pd/actions/runs/6927028596/job/18840151416

Reason for failure (if possible)

Anything else