[avalanche] Reject blocks that contains txs conflicting with finalized txs

Summary:
Such blocks are out of avalanche pre-consensus and should be rejected.

Depends on D15779.

Test Plan:

./test/functional/test_runner.py abc_p2p_avalanche_transaction_voting

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D15781