NRF and AMF use different relation names for fiveg_nrf interface. All the other charms uses fiveg_nrf. We need to use the same naming convention in all charms. For this reason interface name is changed from fiveg-nrf -> fiveg_nrf.
Pinning Juju version to 3.3.0.0. Starting from 3.3.1.0 integration tests are failing.
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