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/runtime/src/lib.rs

@@ -685,18 +685,6 @@ pub fn print(print: impl traits::Printable) {
 	print.print();
 }
 
-/// An alphabet of possible parameters to use for benchmarking.
-#[derive(Encode, Decode, Clone, Copy, PartialEq, Debug)]
-#[allow(missing_docs)]
-pub enum BenchmarkParameter {
-	A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z,
-}
-
-/// Results from running benchmarks on a FRAME pallet.
-/// Contains duration of the function call in nanoseconds along with the benchmark parameters
-/// used for that benchmark result.
-pub type BenchmarkResults = (Vec<(BenchmarkParameter, u32)>, u128);
-
 #[cfg(test)]
 mod tests {
 	use super::*;