[avalanche] Bump the peer replacement cooldown

Summary:
This used to be 1h, bump this value to 1 day instead. This means that a user cannot change its proof more than once per day, which should help having a stable quorum.

Because the tests override the default value, no other change is needed.

Test Plan:

ninja all check-all

Reviewers: #bitcoin_abc, sdulfari

Reviewed By: #bitcoin_abc, sdulfari

Subscribers: sdulfari

Differential Revision: https://reviews.bitcoinabc.org/D11840