[Tests/Utils/Shape] Added a plane-plane intersection unit test
[Tests/Utils/Shape] Added a plane-plane intersection unit test

- Declared the 2 other planes from basic test as general ones to be tested

Signed-off-by: Razakhel <f413280a9c6f5272f1d68d59268288095c68ae97@gmail.com>

Razakhel/RaZ,Razakhel/RaZ