Test: Cleanup asserts on Upgrade/Downgrade test
Test: Cleanup asserts on Upgrade/Downgrade test

Fix some asserts messages, format and error reporting

Signed-off-by: Eloy Coto <2a8acc28452926ceac4d9db555411743254cf5f9@gmail.com>

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