Additional benchmark-storage flags (#11004)

* Fix typos

* Enable overwriting handlebars template

* Optionally name json output or disable json altogether

* Don't write to json by default

* Include block id in handlebars output

* Include warmups for write benchmarks

* PR comments

* Drop unnecessary file extension

* Use more appropriate types

* Use more appropriate error message

* More use of more appropriate types

* Rework write benchmark warmups

* Run same benchmark for both read and write

substrate/utils/frame/benchmarking-cli/src/storage/read.rs

@@ -49,17 +49,6 @@ impl StorageCmd {
 		let mut rng = Self::setup_rng();
 		keys.shuffle(&mut rng);
 
-		// Run some rounds of the benchmark as warmup.
-		for i in 0..self.params.warmups {
-			info!("Warmup round {}/{}", i + 1, self.params.warmups);
-			for key in keys.clone() {
-				let _ = client
-					.storage(&block, &key)
-					.expect("Checked above to exist")
-					.ok_or("Value unexpectedly empty")?;
-			}
-		}
-
 		// Interesting part here:
 		// Read all the keys in the database and measure the time it takes to access each.
 		info!("Reading {} keys", keys.len());