[backport#13756] wallet: enable avoid_partial_spends by default if avoid_reuse is set

Summary:
https://github.com/bitcoin/bitcoin/pull/13756/commits/27669551da52099e4a6a401acd7aa32b32832423

Depends on D6466

Partial backport of Core PR13756

Test Plan:

ninja check
test_runner.py wallet_avoidreuse

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D6467