test: net: igmp: Add IGMP query test

Add functionality to test the IGMP query handling. This test should
prevent the IGMP logic from sending IGMPv3 messages to IGMPv2 queriers.
The test does now also check backwards compatability when IGMPv3 queries
are received but only IGMPv2 is enabled.

Signed-off-by: Ibe Van de Veire <ibe.vandeveire@basalte.be>