Consolidate frame benchmarking into a frame crate (#4977)

This prs cleans up some of the frame benchmarking stuff:
- Move CLI into `frame-benchmarking-cli`. No frame related CLI should
exists in the default Substrate CLI.
- Move all traits and types related to frame benchmarking into the
`frame-benchmarking` trait. Frame types should be isolated in Frame.

substrate/primitives/io/src/lib.rs

@@ -771,30 +771,6 @@ pub trait Logging {
 	}
 }
 
-/// Interface that provides functions for benchmarking the runtime.
-#[runtime_interface]
-pub trait Benchmarking {
-	/// Get the number of nanoseconds passed since the UNIX epoch
-	///
-	/// WARNING! This is a non-deterministic call. Do not use this within
-	/// consensus critical logic.
-	fn current_time() -> u128 {
-		std::time::SystemTime::now().duration_since(std::time::SystemTime::UNIX_EPOCH)
-			.expect("Unix time doesn't go backwards; qed")
-			.as_nanos()
-	}
-
-	/// Reset the trie database to the genesis state.
-	fn wipe_db(&mut self) {
-		self.wipe()
-	}
-
-	/// Commit pending storage changes to the trie database and clear the database cache.
-	fn commit_db(&mut self) {
-		self.commit()
-	}
-}
-
 /// Wasm-only interface that provides functions for interacting with the sandbox.
 #[runtime_interface(wasm_only)]
 pub trait Sandbox {