pallets: implement Default for GenesisConfig in no_std (#2624)

* pallets: implement Default for GenesisConfig in no_std

This change is follow-up of: paritytech/substrate#14108

It is a step towards: https://github.com/paritytech/substrate/issues/13334

* ".git/.scripts/commands/fmt/fmt.sh"

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

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Co-authored-by: command-bot <>

Author: michalkucharczyk