[avalanche] Remove some useless logs

Summary: The "Requesting more avalanche addresses [...]" and "Requesting compact proofs [...]" log messages are printed periodically for each peer, which brings zero information and bloats the log. Get rid of them.

Test Plan:

ninja all check-all

Reviewers: #bitcoin_abc, bytesofman

Reviewed By: #bitcoin_abc, bytesofman

Subscribers: bytesofman

Differential Revision: https://reviews.bitcoinabc.org/D14572