Companion for substrate#14435 (BenchmarkHelper for frame-system) (#2766)

* Temporary fix for frame_system::set_code benchmark

* Removed temprary fix

* BenchmarkHelper for frame-system (TODO: add stuff for ParachainSystem OnSetCode)

* BenchmarkHelper for frame-system (TODO: add stuff for ParachainSystem OnSetCode)

* Glutton

* Fix benchmarks for `set_code`

* Changed dummy values to non-zero

* update lockfile for {"polkadot", "substrate"}

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Co-authored-by: parity-processbot <>