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/client/cli/src/lib.rs

@@ -57,7 +57,7 @@ use params::{
 pub use params::{
 	SharedParams, ImportParams, ExecutionStrategy, Subcommand, RunCmd, BuildSpecCmd,
 	ExportBlocksCmd, ImportBlocksCmd, CheckBlockCmd, PurgeChainCmd, RevertCmd,
-	BenchmarkCmd,
+	WasmExecutionMethod,
 };
 pub use traits::GetSharedParams;
 use app_dirs::{AppInfo, AppDataType};