TestBatchEvict is unstable

[HuSharp]

Flaky Test

TestBatchEvict

Which jobs are failing

=== RUN   TestBatchEvict
[FAIL]  pkg/schedule/schedulers TestBatchEvict
    evict_leader_test.go:128: 
        	Error Trace:	/home/runner/work/pd/pd/pkg/schedule/schedulers/evict_leader_test.go:128
        	Error:      	"[evict-leader-scheduler {evict leader: from store 1 to one in [2 3], or to 2 (for compatibility)} (kind:leader, region:937(0, 0), createAt:2024-08-22 03:39:20.336444041 +0000 UTC m=+0.420246367, startAt:0001-01-01 00:00:00 +0000 UTC, currentStep:0, size:96, steps:[0:{transfer leader from store 1 to store 2}], timeout:[1m0s]) evict-leader-scheduler {evict leader: from store 1 to one in [2 3], or to 2 (for compatibility)} (kind:leader, region:236(0, 0), createAt:2024-08-22 03:39:20.336976915 +0000 UTC m=+0.420779241, startAt:0001-01-01 00:00:00 +0000 UTC, currentStep:0, size:96, steps:[0:{transfer leader from store 1 to store 2}], timeout:[1m0s])]" should have 3 item(s), but has 2
        	Test:       	TestBatchEvict
--- FAIL: TestBatchEvict (0.34s)

CI link

https://github.com/tikv/pd/actions/runs/10501395410/job/29091312395?pr=8558

Reason for failure (if possible)

Anything else