Add e2e test to cover External Control Plane scenario of Multicluster setup

[fjglira]

After the merge of this PR we need to create the e2e test that follow the configuration for External Control Plane

[nrfox]

@fjglira I have a working implementation of this but I'm waiting until #389 is complete since that will affect how the test is written.

[fjglira]

@nrfox I think I almost have the test also. But as you mentioned, with the old way of setting the remote resource. If you already have something, we can use your test without any issue