[avalanche] Do same checks on local proof as peer proofs in getavalancheinfo functional test

Summary: This improves upon D11867 to include the local proof in the log message checks and make future test changes more robust.

Test Plan:

ninja
./test/functional/test_runner.py abc_rpc_getavalancheinfo

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D11869