migrate timeout in Go Integration Cases

[infdahai]

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• I had searched in the issues and found no similar issues.

Version

unstable

Minimal reproduce step

the ref to CI jobs: https://github.com/infdahai/incubator-kvrocks/actions/runs/5032023303/jobs/9025509337

The change is on infdahai/incubator-kvrocks@fb0e3d4...7a5a2c2. I only run 10 tests in a loop.

What did you expect to see?

All tests pass， especially the Migrate_sync_with_(or_without)_all_kinds_of_timeouts test.

What did you see instead?

--- FAIL: TestSlotMigrateSync/MIGRATE_-Migrate_sync_with(or_without)all_kinds_of_timeouts#09 (0.01s)
slotmigrate_test.go:426:
Error Trace: /home/runner/work/incubator-kvrocks/incubator-kvrocks/tests/gocase/integration/slotmigrate/slotmigrate_test.go:426
Error: Not equal:
expected: string("OK")
actual : ()
Test: TestSlotMigrateSync/MIGRATE-Migrate_sync_with(or_without)_all_kinds_of_timeouts#09

Anything Else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!

[infdahai]

The PR #1418 introduces the test. And it often causes CI failure.
https://github.com/apache/incubator-kvrocks/blob/fb0e3d42031a6e0691c7a736711d0a01d72bdb1a/tests/gocase/integration/slotmigrate/slotmigrate_test.go#L414-L432