GenesisBuild<T,I> deprecated. BuildGenesisConfig added.

[michalkucharczyk]

The PR deprecates BuildGenesis<T,I> trait.

Instead of it new non-generic trait BuildGenesisConfig is introduced. It is implemented for pallet's and runtime's GenesisConfigs.
The new trait provides single build function which is intended to put initial values of genesis config into the storage.
Storage building and assimilating can now be achieved by BuildStorage trait.

Lack of generic type parameters in new trait implies a requirement to add generic parameter to generic-less GenesisConfig structs which were accessing T type in its build function.
Following pallets were affected:

• authority-discovery,
• babe,
• democracy,
• glutton,
• grandpa,
• system,
• transaction-payment,
• treasury,
• substrate runtime pallet,
  The _instance and/or _config: PhantomData<T> fields was added whenever required.

The genesis_build macro supports both GenesisBuild<T> and BuildGenesisConfig.

As the BuildGenesisConfig and BuildStorage are defined in different crates, BuildStorage is implemented by pallet macro for each pallet's GenesisConfig.

BuildGenesisConfig is implemented for RuntimeGenesisConfig by construct_runtime macro.

Additionaly unused BuildModuleGenesisStorage was deprecated and removed from macros.

Step towards: paritytech/polkadot-sdk#25

polkadot companion: paritytech/polkadot#7397
cumulus companion: paritytech/cumulus#2757

[michalkucharczyk]

Example of generated implementation (for substrate-test-runtime):

impl<T> ::frame_support::traits::GenesisBuild<T> for GenesisConfig {
    fn build(&self) {
        <SystemConfig as ::frame_support::traits::GenesisBuild<
            Runtime,
            frame_system::__InherentHiddenInstance,
        >>::build(&self.system);
        <BabeConfig as ::frame_support::traits::GenesisBuild<
            Runtime,
            pallet_babe::__InherentHiddenInstance,
        >>::build(&self.babe);
        <SubstrateTestConfig as ::frame_support::traits::GenesisBuild<
            Runtime,
            substrate_test_pallet::pallet::__InherentHiddenInstance,
        >>::build(&self.substrate_test);
        <BalancesConfig as ::frame_support::traits::GenesisBuild<
            Runtime,
            pallet_balances::__InherentHiddenInstance,
        >>::build(&self.balances);
    }
}

[michalkucharczyk]

bot rebase

[paritytech-processbot]

Rebased

[michalkucharczyk]

bot rebase

[paritytech-processbot]

Rebased

[michalkucharczyk]

bot merge