Fix or remove tests: Resilience Postgres (E2E Multizone Suite)

[bartsmykla]

These tests are currently disabled. We should check if they're still relevant. If they are, we should fix them; if not, we should remove them.

Skipped test cases

kuma/test/e2e_env/multizone/resilience/resilience_multizone_universal_postgres.go

Line 171 in 02a8b25

XIt("should mark zone as offline when zone control-plane is down", func() {