* Refactor: Rename variables and helper method to `PohRecorder` (#22676)
* Refactor: Rename leader_first_tick_height field
* Refactor: add `PohRecorder::slot_for_tick_height` helper
* Refactor: Add type for poh leader status
(cherry picked from commit 1240217a73
)
# Conflicts:
# core/src/replay_stage.rs
# poh/src/poh_recorder.rs
* resolve conflicts
Co-authored-by: Justin Starry <justin@solana.com>