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/weights.hbs

@@ -19,6 +19,7 @@
 //! DATE: {{date}}
 //!
 //! DATABASE: `{{db_name}}`, RUNTIME: `{{runtime_name}}`
+//! BLOCK-NUM: `{{block_number}}`
 //! SKIP-WRITE: `{{params.skip_write}}`, SKIP-READ: `{{params.skip_read}}`, WARMUPS: `{{params.warmups}}`
 //! STATE-VERSION: `V{{params.state_version}}`, STATE-CACHE-SIZE: `{{params.state_cache_size}}`
 //! WEIGHT-PATH: `{{params.weight_path}}`