Move entry/poh to own crate to speed up poh bench build (#18225)

poh/Cargo.toml

@@ -13,6 +13,7 @@ edition = "2018"
 core_affinity = "0.5.10"
 crossbeam-channel = "0.5"
 log = "0.4.14"
+solana-entry = { path = "../entry", version = "=1.8.0" }
 solana-ledger = { path = "../ledger", version = "=1.8.0" }
 solana-measure = { path = "../measure", version = "=1.8.0" }
 solana-metrics = { path = "../metrics", version = "=1.8.0" }

poh/benches/poh.rs

@@ -4,7 +4,7 @@
 extern crate test;
 
 use {
-    solana_ledger::poh::Poh,
+    solana_entry::poh::Poh,
     solana_poh::poh_service::DEFAULT_HASHES_PER_BATCH,
     solana_sdk::hash::Hash,
     std::sync::{

poh/benches/poh_verify.rs

@@ -2,7 +2,7 @@
 extern crate test;
 
 use {
-    solana_ledger::entry::{next_entry_mut, Entry, EntrySlice},
+    solana_entry::entry::{next_entry_mut, Entry, EntrySlice},
     solana_sdk::{
         hash::{hash, Hash},
         signature::{Keypair, Signer},

poh/src/poh_recorder.rs

@@ -17,9 +17,8 @@ use {
         unbounded, Receiver as CrossbeamReceiver, RecvTimeoutError, Sender as CrossbeamSender,
     },
     log::*,
-    solana_ledger::{
-        blockstore::Blockstore, entry::Entry, leader_schedule_cache::LeaderScheduleCache, poh::Poh,
-    },
+    solana_entry::{entry::Entry, poh::Poh},
+    solana_ledger::{blockstore::Blockstore, leader_schedule_cache::LeaderScheduleCache},
     solana_runtime::bank::Bank,
     solana_sdk::{
         clock::NUM_CONSECUTIVE_LEADER_SLOTS, hash::Hash, poh_config::PohConfig, pubkey::Pubkey,

poh/src/poh_service.rs

@@ -4,7 +4,7 @@ use {
     crate::poh_recorder::{PohRecorder, Record},
     crossbeam_channel::Receiver,
     log::*,
-    solana_ledger::poh::Poh,
+    solana_entry::poh::Poh,
     solana_measure::measure::Measure,
     solana_sdk::poh_config::PohConfig,
     std::{