* Ensure highest_confirmed_root only grows (#11596)
* Split out commitment-cache update for unit testing
* Add failing test
* Ensure highest_confirmed_root only grows
(cherry picked from commit 4da1e9833c
)
# Conflicts:
# core/src/commitment_service.rs
* Adapt to v1.2
Co-authored-by: Tyera Eulberg <teulberg@gmail.com>
Co-authored-by: Tyera Eulberg <tyera@solana.com>