prefactor: move FilesystemStore utilies into fs_store/common.rs

Ahead of adding the FilesystemStoreV2 we move some common utilies into a
shared file.

We also move the FilesystemStore into its own module.

Author: benthecarman

bench/benches/bench.rs

@@ -18,7 +18,7 @@ criterion_group!(benches,
 	lightning::routing::router::benches::generate_large_mpp_routes_with_nonlinear_probabilistic_scorer,
 	lightning::sign::benches::bench_get_secure_random_bytes,
 	lightning::ln::channelmanager::bench::bench_sends,
-	lightning_persister::fs_store::bench::bench_sends,
+	lightning_persister::fs_store::v1::bench::bench_sends,
 	lightning_rapid_gossip_sync::bench::bench_reading_full_graph_from_file,
 	lightning::routing::gossip::benches::read_network_graph,
 	lightning::routing::gossip::benches::write_network_graph,

fuzz/src/fs_store.rs

@@ -1,6 +1,6 @@
 use core::hash::{BuildHasher, Hasher};
 use lightning::util::persist::{KVStore, KVStoreSync};
-use lightning_persister::fs_store::FilesystemStore;
+use lightning_persister::fs_store::v1::FilesystemStore;
 use std::fs;
 use tokio::runtime::Runtime;
 

lightning-background-processor/src/lib.rs

@@ -1934,7 +1934,7 @@ mod tests {
 	use lightning::{get_event, get_event_msg};
 	use lightning_liquidity::utils::time::DefaultTimeProvider;
 	use lightning_liquidity::{ALiquidityManagerSync, LiquidityManager, LiquidityManagerSync};
-	use lightning_persister::fs_store::FilesystemStore;
+	use lightning_persister::fs_store::v1::FilesystemStore;
 	use lightning_rapid_gossip_sync::RapidGossipSync;
 	use std::collections::VecDeque;
 	use std::path::PathBuf;