Use Handlebars Template for Benchmark CLI Output (#7390)

* add_handlebar_template_to_benchmark

- add benchmark-cli arg to take in a handlebar-template file

* update to always use template

* rewrite writer for handlebars

* polish

* pass cmd data

* update docs

* support custom filename output

* Update command.rs

* Create frame-weight-template.hbs

* use a vector to maintain benchmark order

* fix tests

* Custom string serializer, remove feature flag

* update docs

* docs on public objects

* small fix

Co-authored-by: Ezadkiel Marbella <zadkiel.m@gmail.com>

substrate/utils/frame/benchmarking-cli/src/lib.rs

@@ -68,9 +68,9 @@ pub struct BenchmarkCmd {
 	#[structopt(long)]
 	pub header: Option<std::path::PathBuf>,
 
-	/// Output the trait definition to a Rust file.
+	/// Path to Handlebars template file used for outputting benchmark results. (Optional)
 	#[structopt(long)]
-	pub trait_def: bool,
+	pub template: Option<std::path::PathBuf>,
 
 	/// Set the heap pages while running benchmarks.
 	#[structopt(long)]
@@ -84,18 +84,6 @@ pub struct BenchmarkCmd {
 	#[structopt(long)]
 	pub extra: bool,
 
-	/// Output files using spaces instead of tabs.
-	#[structopt(long)]
-	pub spaces: bool,
-
-	/// Output benchmarks file using this struct name.
-	#[structopt(long, default_value = "WeightInfo")]
-	pub r#struct: String,
-
-	/// Output benchmarks file using this trait name.
-	#[structopt(long, default_value = "WeightInfo")]
-	pub r#trait: String,
-
 	#[allow(missing_docs)]
 	#[structopt(flatten)]
 	pub shared_params: sc_cli::SharedParams,