Extract layers module from rpc crate (#8163)

Co-authored-by: Emilia Hane <emiliaha95@gmail.com>

crates/node/builder/Cargo.toml

@@ -22,6 +22,7 @@ reth-provider.workspace = true
 reth-db.workspace = true
 reth-rpc-engine-api.workspace = true
 reth-rpc.workspace = true
+reth-rpc-layer.workspace = true
 reth-node-api.workspace = true
 reth-node-core.workspace = true
 reth-network.workspace = true

crates/node/builder/src/launch/common.rs

@@ -19,7 +19,7 @@ use reth_node_core::{
 use reth_primitives::{BlockNumber, Chain, ChainSpec, Head, PruneModes, B256};
 use reth_provider::{providers::StaticFileProvider, ProviderFactory, StaticFileProviderFactory};
 use reth_prune::PrunerBuilder;
-use reth_rpc::JwtSecret;
+use reth_rpc_layer::JwtSecret;
 use reth_static_file::StaticFileProducer;
 use reth_tasks::TaskExecutor;
 use reth_tracing::tracing::{error, info, warn};

crates/node/builder/src/lib.rs

@@ -46,3 +46,5 @@ pub use reth_node_core::node_config::NodeConfig;
 pub use reth_node_api::*;
 
 use aquamarine as _;
+
+use reth_rpc as _;

crates/node/builder/src/rpc.rs

@@ -15,7 +15,7 @@ use reth_node_core::{
     },
 };
 use reth_payload_builder::PayloadBuilderHandle;
-use reth_rpc::JwtSecret;
+use reth_rpc_layer::JwtSecret;
 use reth_tasks::TaskExecutor;
 use reth_tracing::tracing::{debug, info};
 use std::{