[avalanche] Activate staking rewards on Nov. 15th, 2023

Summary: This enables the staking rewards rule on the cowperthwaite activation.

Test Plan:

ninja all check-all

Reviewers: #bitcoin_abc, bytesofman, PiRK

Reviewed By: #bitcoin_abc, bytesofman, PiRK

Subscribers: bytesofman

Differential Revision: https://reviews.bitcoinabc.org/D14517