Introduce eager rent collection (#9527)

* Switch AccountsIndex.account_maps from HashMap to BTreeMap

* Introduce eager rent collection

* Start to add tests

* Avoid too short eager rent collection cycles

* Add more tests

* Add more tests...

* Refacotr!!!!!!

* Refactoring follow up

* More tiny cleanups

* Don't rewrite 0-lamport accounts to be deterministic

* Refactor a bit

* Do hard fork, restore tests, and perf. mitigation

* Fix build...

* Refactor and add switch over for testnet (TdS)

* Use to_be_bytes

* cleanup

* More tiny cleanup

* Rebase cleanup

* Set Bank::genesis_hash when resuming from snapshot

* Reorder fns and clean ups

* Better naming and commenting

* Yet more naming clarifications

* Make prefix width strictly uniform for 2-base partition_count

* Fix typo...

* Revert cluster-dependent gate

* kick ci?

* kick ci?

* kick ci?

ledger/src/snapshot_utils.rs

@@ -15,7 +15,7 @@ use solana_runtime::{
         MAX_SNAPSHOT_DATA_FILE_SIZE,
     },
 };
-use solana_sdk::{clock::Slot, hash::Hash, pubkey::Pubkey};
+use solana_sdk::{clock::Slot, genesis_config::GenesisConfig, hash::Hash, pubkey::Pubkey};
 use std::{
     cmp::Ordering,
     fs::{self, File},
@@ -451,6 +451,7 @@ pub fn bank_from_archive<P: AsRef<Path>>(
     snapshot_path: &PathBuf,
     snapshot_tar: P,
     compression: CompressionType,
+    genesis_config: &GenesisConfig,
 ) -> Result<Bank> {
     // Untar the snapshot into a temp directory under `snapshot_config.snapshot_path()`
     let unpack_dir = tempfile::tempdir_in(snapshot_path)?;
@@ -470,6 +471,7 @@ pub fn bank_from_archive<P: AsRef<Path>>(
         frozen_account_pubkeys,
         &unpacked_snapshots_dir,
         unpacked_accounts_dir,
+        genesis_config,
     )?;
 
     if !bank.verify_snapshot_bank() {
@@ -615,6 +617,7 @@ fn rebuild_bank_from_snapshots<P>(
     frozen_account_pubkeys: &[Pubkey],
     unpacked_snapshots_dir: &PathBuf,
     append_vecs_path: P,
+    genesis_config: &GenesisConfig,
 ) -> Result<Bank>
 where
     P: AsRef<Path>,
@@ -643,6 +646,7 @@ where
                     )));
                 }
             };
+            bank.operating_mode = Some(genesis_config.operating_mode);
             info!("Rebuilding accounts...");
             let rc = bank::BankRc::from_stream(
                 account_paths,