flaky test TestParallelCancel

[D3Hunter]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

local debug can reproduce it, 1 out of 3 runs

    scheduler_test.go:253: 
        	Error Trace:	pkg/disttask/framework/scheduler/scheduler_test.go:253
        	            				pkg/disttask/framework/scheduler/scheduler_test.go:315
        	            				pkg/disttask/framework/scheduler/scheduler_test.go:355
        	Error:      	"60" is not less than "60"
        	Test:       	TestParallelCancel

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

success

3. What did you see instead (Required)

fail

4. What is your TiDB version? (Required)

master

[D3Hunter]

TestRenewLeaseABAFailPoint has already fixed by #55620