Adds ability to prepare/initialize before running `set_code` benchmark (#14435)

* Adds ability to prepare/initialize before running `set_code` benchmark

* Fix

* ".git/.scripts/commands/bench/bench.sh" pallet dev frame-system

* Replaced BenchmarkHelper with function

* Fix

* Introduced `set_code_data` for benchmark with default value

* ".git/.scripts/commands/bench/bench.sh" pallet dev frame-system

* (Hope) Final adjustment (because system parachains generates ValidationFunctionStored instead of CodeUpdated)

* ".git/.scripts/commands/bench/bench.sh" pallet dev frame-system

* ".git/.scripts/commands/bench-vm/bench-vm.sh" pallet dev frame-system

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Co-authored-by: command-bot <>