[avalanche] Activate the staking rewards preconsensus on November 15

Summary:
This enables the feature option by default. It is still gated with the activation MTP.

Depends on D18688.

Test Plan:

ninja all check-all
ninja check-upgrade-activated

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Subscribers: PiRK

Differential Revision: https://reviews.bitcoinabc.org/D18689