add pdu session release command test

[Raguideau]

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.

• [x] I have read the CONTRIBUTING document.
• [x] Each of my commits messages include Signed-off-by: Author Name <authoremail@example.com> to accept the DCO.

[linouxis9]

LGTM!

time="2023-12-07T16:12:44Z" level=info msg="[GNB][NGAP][UE] UPF Address: 0.0.0.0 :2152
time="2023-12-07T16:12:44Z" level=info msg="[UE][NAS] PDU address received: 0.0.0.0"

IP = 0.0.0.0 is expected?

[Raguideau]

No it was not, it's fixed now :)