feat: group optimism crates (#7740)

Cargo.toml

@@ -48,7 +48,7 @@ members = [
     "crates/ethereum-engine-primitives/",
     "crates/node-ethereum/",
     "crates/node-builder/",
-    "crates/node-optimism/",
+    "crates/optimism/node/",
     "crates/node-core/",
     "crates/node-api/",
     "crates/node-e2e-tests/",
@@ -216,7 +216,7 @@ reth-engine-primitives = { path = "crates/engine-primitives" }
 reth-ethereum-engine-primitives = { path = "crates/ethereum-engine-primitives" }
 reth-node-builder = { path = "crates/node-builder" }
 reth-node-ethereum = { path = "crates/node-ethereum" }
-reth-node-optimism = { path = "crates/node-optimism" }
+reth-node-optimism = { path = "crates/optimism/node" }
 reth-node-core = { path = "crates/node-core" }
 reth-node-api = { path = "crates/node-api" }
 reth-downloaders = { path = "crates/net/downloaders" }