TestAllocIDAfterLeaderChange is unstable

[HuSharp]

Flaky Test

TestAllocIDAfterLeaderChange is unstable

Which jobs are failing

2024-08-22T02:33:09.9000891Z [2024/08/22 02:33:09.268 +00:00] [INFO] [server.go:1678] ["skip campaigning of pd leader and check later"] [server-name=pd2] [etcd-leader-id=16910137396250798226] [member-id=7914137599778630982]
2024-08-22T02:33:09.9002667Z     server_test.go:117: 
2024-08-22T02:33:09.9004241Z         	Error Trace:	/home/runner/work/pd/pd/tests/integrations/mcs/scheduling/server_test.go:117
2024-08-22T02:33:09.9005646Z         	Error:      	Received unexpected error:
2024-08-22T02:33:09.9006974Z         	            	rpc error: code = Unavailable desc = not leader
2024-08-22T02:33:09.9008239Z         	Test:       	TestServerTestSuite/TestAllocIDAfterLeaderChange

CI link

https://github.com/tikv/pd/actions/runs/10500794166/job/29089748958?pr=8556
https://github.com/tikv/pd/actions/runs/10485694539/job/29042347520

Reason for failure (if possible)

need to wait leader

Anything else