flaky TestProvidesExpire test

[marten-seemann]

=== RUN   TestProvidesExpire
      providers_manager_test.go:218: expected everything to be cleaned out of the datastore
  --- FAIL: TestProvidesExpire (1.15s)

[guillaumemichel]

=== RUN   TestProvidesExpire
    providers_manager_test.go:210: expected providers to still be there
--- FAIL: TestProvidesExpire (0.86s)

https://github.com/libp2p/go-libp2p-kad-dht/actions/runs/13944782424/job/39029368896?pr=1067#step:14:311

[guillaumemichel]

=== RUN   TestProvidesExpire
    providers_manager_test.go:210: expected providers to still be there
--- FAIL: TestProvidesExpire (0.78s)

https://github.com/libp2p/go-libp2p-kad-dht/actions/runs/14735084702/job/41359046360?pr=1079#step:13:3495