tests: net: ipv6: Check if we receive ::1 as src or dst address
tests: net: ipv6: Check if we receive ::1 as src or dst address

Add two tests that will check if the source or destination address
is loopback address ::1 and we drop those packets.

Signed-off-by: Jukka Rissanen <f9f077d1da4c7aa947f9864fa5a28c3588f6a45d@linux.intel.com>

ldts/zephyr,finikorg/zephyr,nashif/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,explora26/zephyr,punitvara/zephyr,ldts/zephyr,explora26/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,finikorg/zephyr,galak/zephyr,nashif/zephyr,ldts/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,finikorg/zephyr,ldts/zephyr,Vudentz/zephyr,punitvara/zephyr,Vudentz/zephyr,punitvara/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,finikorg/zephyr,Vudentz/zephyr,nashif/zephyr,Vudentz/zephyr,explora26/zephyr,nashif/zephyr,explora26/zephyr,Vudentz/zephyr