Add OpenGov to Darwinia

[aurexav]

No description provided.

[boundless-forest]

@AurevoirXavier Please update the branch to pass CI

[github-actions]

Check 1b6192e pangoro-dev

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[github-actions]

Check 1b6192e crab-dev

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RuntimeVersion {
    spec_name: "Crab2",
    impl_name: "DarwiniaOfficialRust",
    authoring_version: 0,
-   spec_version: 6511,
+   spec_version: 6510,
    impl_version: 0,
    transaction_version: 0,
    state_version: 0,
}

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- Pallet: "EcdsaAuthority"
- Pallet: "MessageGadget"

[github-actions]

Check 1b6192e darwinia-dev

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RuntimeVersion {
    spec_name: "Darwinia2",
    impl_name: "DarwiniaOfficialRust",
    authoring_version: 0,
-   spec_version: 6501,
+   spec_version: 6510,
    impl_version: 0,
    transaction_version: 0,
    state_version: 0,
}

Check runtime storage

+ Pallet: "ConvictionVoting"
- Pallet: "PhragmenElection"
+ Pallet: "Referenda"
- Pallet: "TechnicalMembership"
+ Pallet: "Whitelist"

[github-actions]

Check 1b6192e pangolin-dev

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[boundless-forest]

LGTM. Lacking the support for the evm, I'll raise a PR after this merge.