* LedgerCleanupService no longer causes an OOM and actually purges (#10199)
* cleanup_ledger() now services new_root_receiver while purging
* purge_slots() now fully deletes before compacting
* Add ledger pruning grafana graph
(cherry picked from commit 156387aba4
)
* fixup
Co-authored-by: Michael Vines <mvines@gmail.com>