Fix wallet_reorgsrestore functional test flakiness

Summary:
The test is not designed to account for the parking feature, so disable
it.

Test Plan:

for i in range {1..100}; do
  if ! ./test/functional/test_runner.py wallet_reorgsrestore; then
    break
  fi
done

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D7088