[avalanche] Complete the full node eviction test

Summary:
There is a test case that is expected to cover all the node protection features at once which is missing the 4 nodes protected by last new proof reception time. This was missed in D9836.

Ref T1634.

Test Plan:

ninja check-bitcoin-net_tests

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Maniphest Tasks: T1634

Differential Revision: https://reviews.bitcoinabc.org/D9856