Benchmark Utility Pallet (#5384)

* Move tests

* Move around feature cfgs

* Start benchmarks

* as_multi bench

* finish

* fix tests

* Update frame/utility/src/benchmarking.rs

Co-Authored-By: Marcio Diaz <marcio.diaz@gmail.com>

* Update Cargo.toml

* fix test

Co-authored-by: Marcio Diaz <marcio.diaz@gmail.com>

substrate/frame/benchmark/src/benchmarking.rs

@@ -16,6 +16,8 @@
 
 //! Benchmarks for common FRAME Pallet operations.
 
+#![cfg(feature = "runtime-benchmarks")]
+
 use super::*;
 
 use frame_system::RawOrigin;