test: install Cilium before creating any pods in upgrade test
test: install Cilium before creating any pods in upgrade test

As Cilium is installed with with the clean state it can delete the
connectivity endpoints recently created before deploying Cilium causing
the test to fail.

Fixes: fde53a778a32 ("test: add etcd-operator to CI")
Signed-off-by: André Martins <bc9800b9d52a24cce72a73dd528afed53f10e5fc@cilium.io>

scanf/cilium,tgraf/cilium,tklauser/cilium,tklauser/cilium,cilium/cilium,scanf/cilium,michi-covalent/cilium,tgraf/cilium,tgraf/cilium,michi-covalent/cilium,scanf/cilium,michi-covalent/cilium,scanf/cilium,michi-covalent/cilium,scanf/cilium,tgraf/cilium,tgraf/cilium,cilium/cilium,scanf/cilium,cilium-team/cilium,cilium/cilium,cilium/cilium,scanf/cilium,tklauser/cilium,michi-covalent/cilium,tklauser/cilium,tgraf/cilium,tklauser/cilium,cilium-team/cilium,cilium/cilium