test: net: igmp: Add extra IGMPv3 testcase

Added extra testcases for the IGMPv3 protocol. The IGMP driver is
supposed to send an IGMPv3 report when joining a group.

Signed-off-by: Ibe Van de Veire <ibe.vandeveire@basalte.be>
(cherry picked from commit e6dd4cda)