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

entry/Cargo.toml

@@ -0,0 +1,36 @@
+[package]
+name = "solana-entry"
+version = "1.8.0"
+description = "Solana Entry"
+authors = ["Solana Maintainers <maintainers@solana.foundation>"]
+repository = "https://github.com/solana-labs/solana"
+license = "Apache-2.0"
+homepage = "https://solana.com/"
+documentation = "https://docs.rs/solana-poh"
+edition = "2018"
+
+[dependencies]
+bincode = "1.3.3"
+dlopen = "0.1.8"
+dlopen_derive = "0.1.4"
+log = "0.4.11"
+rand = "0.7.0"
+rayon = "1.5.1"
+serde = "1.0.126"
+solana-measure = { path = "../measure", version = "=1.8.0" }
+solana-merkle-tree = { path = "../merkle-tree", version = "=1.8.0" }
+solana-metrics = { path = "../metrics", version = "=1.8.0" }
+solana-perf = { path = "../perf", version = "=1.8.0" }
+solana-rayon-threadlimit = { path = "../rayon-threadlimit", version = "=1.8.0" }
+solana-sdk = { path = "../sdk", version = "=1.8.0" }
+
+[dev-dependencies]
+matches = "0.1.6"
+solana-logger = { path = "../logger", version = "=1.8.0" }
+
+[lib]
+crate-type = ["lib"]
+name = "solana_entry"
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]