(LedgerStore) Use different path for different blockstore storage type. (#23236)

#### Summary of Changes
To avoid mixing the use of different shred storage types, each shred storage type
will have its blockstore in a different directory.

This PR still keeps the RocksFifo setting hidden.  The default ShredStorageType and
blockstore directory are still RocksLevel and `rocksdb`.

Will follow-up with PRs on making FIFO option public in ledger-tool and validator.

#### Test Plan
* Added a new test to verify the existence of `rocksdb-fifo` directory when FIFO compaction is used.
* Updated existing test to verify the current setting still store ledger under `rocksdb` directory.
* Manually ran ledger_cleanup_test with both level and fifo compaction and verified the resulting ledger.
* Ran a validator with this PR.

genesis/src/main.rs

@@ -13,7 +13,10 @@ use {
     },
     solana_entry::poh::compute_hashes_per_tick,
     solana_genesis::{genesis_accounts::add_genesis_accounts, Base64Account},
-    solana_ledger::{blockstore::create_new_ledger, blockstore_db::AccessType},
+    solana_ledger::{
+        blockstore::create_new_ledger,
+        blockstore_db::{AccessType, ShredStorageType},
+    },
     solana_runtime::hardened_unpack::MAX_GENESIS_ARCHIVE_UNPACKED_SIZE,
     solana_sdk::{
         account::{Account, AccountSharedData, ReadableAccount, WritableAccount},
@@ -630,6 +633,7 @@ fn main() -> Result<(), Box<dyn error::Error>> {
         &genesis_config,
         max_genesis_archive_unpacked_size,
         AccessType::PrimaryOnly,
+        ShredStorageType::default(),
     )?;
 
     println!("{}", genesis_config);