[lint] update Avalanche change to circular dep status

Summary:
avalanche -> validation -> avalanche is now avalanche/processor ->
validation -> avalanche/processor

Depends on D6965

Test Plan:

./test/lint/lint-circular-dependencies.sh

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D6966