[Platform] IPv6Addresses list is empty in NetworkInterfaces attribute (CC13x2_26x2)

[ReneJosefsen]

Reproduction steps

Execute TC-DGGEN-2.1 and check NetworkInterfaces attribute.

Currently the following is returned:

NetworkInterfaces: 1 entries
[1663148094.593208][2995:3000] CHIP:TOO:     [1]: {
[1663148094.593256][2995:3000] CHIP:TOO:       Name: 5b25
[1663148094.593298][2995:3000] CHIP:TOO:       IsOperational: TRUE
[1663148094.593362][2995:3000] CHIP:TOO:       OffPremiseServicesReachableIPv4: null
[1663148094.593408][2995:3000] CHIP:TOO:       OffPremiseServicesReachableIPv6: null
[1663148094.593457][2995:3000] CHIP:TOO:       HardwareAddress: 94A9012000AB0115
[1663148094.593505][2995:3000] CHIP:TOO:       IPv4Addresses: 0 entries
[1663148094.593557][2995:3000] CHIP:TOO:       IPv6Addresses: 0 entries
[1663148094.593606][2995:3000] CHIP:TOO:       Type: 4
[1663148094.593649][2995:3000] CHIP:TOO:      }

In this case it is expected that IPv6Addresses should contain the IP addresses of the DUT.

### Platform

cc13x2_cc26x2

### Platform Version(s)

N/A

### Type

Manually tested with SDK

### (Optional) If manually tested please explain why this is only manually tested

Found during SVE2 test after inclusion of https://github.com/project-chip/connectedhomeip/pull/22583

### Anything else?

_No response_