Avoid full-range compactions with periodic filtered b.g. ones (#16697)

* Update rocksdb to v0.16.0

* Promote the infrequent and important log to info!

* Force background compaction by ttl without manual compaction

* Fix test

* Support no compaction mode in test_ledger_cleanup_compaction

* Fix comment

* Make compaction_interval customizable

* Avoid major compaction with periodic filtering...

* Adress lazy_static, special cfs and range check

* Clean up a bit and add comment

* Add comment

* More comments...

* Config code cleanup

* Add comment

* Use .conflicts_with()

* Nullify unneeded delete_range ops for special CFs

* Some clean ups

* Clarify the locking intention

* Ensure special CFs' consistency with PurgeType::CompactionFilter

* Fix comment

* Fix bad copy paste

* Fix various types...

* Don't use tuples

* Add a unit test for compaction_filter

* Fix typo...

* Remove flag and just use new behavior always

* Fix wrong condition negation...

* Doc. about no set_last_purged_slot in purge_slots

* Write a test and fix off-by-one bug....

* Apply suggestions from code review

Co-authored-by: Tyera Eulberg <teulberg@gmail.com>

* Follow up to github review suggestions

* Fix line-wrapping

* Fix conflict

Co-authored-by: Tyera Eulberg <teulberg@gmail.com>

core/src/validator.rs

@@ -1636,9 +1636,11 @@ mod tests {
             }
             drop(blockstore);
 
+            // this purges and compacts all slots greater than or equal to 5
             backup_and_clear_blockstore(&blockstore_path, 5, 2);
 
             let blockstore = Blockstore::open(&blockstore_path).unwrap();
+            // assert that slots less than 5 aren't affected
             assert!(blockstore.meta(4).unwrap().unwrap().next_slots.is_empty());
             for i in 5..10 {
                 assert!(blockstore