bug: peer-exchange doesn't get triggered in e2e tests

[weboko]

Description

For some reason in comprehensive test when I expect js-waku to discover another nwaku node - it doesn't.

Expected Behavior

It should.

Notes

Example: https://github.com/waku-org/js-waku/blob/872404466e7f22aa954c2af26f3fbf9c3afd4bdc/packages/tests/tests/connection-mananger/discovery_dialer.spec.ts#L51

[weboko]

Added feature to re-query connected peers in #2537