proper executor/block type for benchmarks and try-runtime (#2771)

* proper executor/block type for benchmarks and try-runtime

* Fix

* update benches as well to latest work

* Remvoe dbg

polkadot/node/service/src/lib.rs

@@ -160,6 +160,12 @@ pub trait IdentifyVariant {
 
 	/// Returns if this is a configuration for the `Rococo` network.
 	fn is_rococo(&self) -> bool;
+
+	/// Returns if this is a configuration for the `Polkadot` network.
+	fn is_polkadot(&self) -> bool;
+
+	/// Returns true if this configuration is for a development network.
+	fn is_dev(&self) -> bool;
 }
 
 impl IdentifyVariant for Box<dyn ChainSpec> {
@@ -172,6 +178,12 @@ impl IdentifyVariant for Box<dyn ChainSpec> {
 	fn is_rococo(&self) -> bool {
 		self.id().starts_with("rococo") || self.id().starts_with("rco")
 	}
+	fn is_polkadot(&self) -> bool {
+		self.id().starts_with("polkadot") || self.id().starts_with("dot")
+	}
+	fn is_dev(&self) -> bool {
+		self.id().ends_with("dev")
+	}
 }
 
 // If we're using prometheus, use a registry with a prefix of `polkadot`.