chore: remove local runtime

[ipapandinas]

Pull Request Summary

Closes #1567

Rework the local node accordingly:

• Uses Shibuya runtime with development genesis preset
• Automatic block production via manual seal
• Removes aura+grandpa

[Dinonard]

Please also check astar docs. We might reference this in a few places.

[ermalkaleci]

Does cargo run -- --dev still works?

[ipapandinas]

@ermalkaleci

Does cargo run -- --dev still works?

No, you need to specify --chain shibuya-dev, and you're right, this is bad for our frontier-tests.

@Dinonard I suggest to drop the existing local node but use instead polkadot-omni-node with a minimal NodeSpec that keeps Frontier alive, adding InitBlockImport (for FrontierBlockImport), BuildRpcExtensions (EVM/debug/txpool RPCs), and StartConsensus (Aura/manual-seal in dev).

[Dinonard]

No, you need to specify --chain shibuya-dev, and you're right, this is bad for our frontier-tests.

@Dinonard I suggest to drop the existing local node but use instead polkadot-omni-node with a minimal NodeSpec that keeps Frontier alive, adding InitBlockImport (for FrontierBlockImport), BuildRpcExtensions (EVM/debug/txpool RPCs), and StartConsensus (Aura/manual-seal in dev).

If it's simple to do, great.
Even better.

[github-actions]

Package	Line Rate	Branch Rate	Health
pallets/astar-xcm-benchmarks/src/generic	100%	0%	✔
chain-extensions/unified-accounts/src	0%	0%	❌
pallets/dynamic-evm-base-fee/src	85%	0%	✔
pallets/xc-asset-config/src	57%	0%	➖
chain-extensions/types/assets/src	0%	0%	❌
precompiles/assets-erc20/src	77%	0%	➖
pallets/democracy-mbm/src	30%	0%	❌
precompiles/unified-accounts/src	100%	0%	✔
pallets/static-price-provider/src	91%	0%	✔
pallets/collator-selection/src	82%	0%	✔
chain-extensions/types/unified-accounts/src	0%	0%	❌
pallets/price-aggregator/src	75%	0%	➖
primitives/src	55%	0%	➖
pallets/dapp-staking/src/test	0%	0%	❌
precompiles/dapp-staking/src	89%	0%	✔
precompiles/xcm/src	69%	0%	➖
pallets/dapp-staking/src/benchmarking	95%	0%	✔
pallets/inflation/src	58%	0%	➖
precompiles/dapp-staking/src/test	0%	0%	❌
pallets/unified-accounts/src	80%	0%	✔
pallets/astar-xcm-benchmarks/src	86%	0%	✔
pallets/dapp-staking/src	81%	0%	✔
pallets/dapp-staking/rpc/runtime-api/src	0%	0%	❌
pallets/collective-proxy/src	94%	0%	✔
pallets/ethereum-checked/src	76%	0%	➖
precompiles/substrate-ecdsa/src	74%	0%	➖
chain-extensions/pallet-assets/src	55%	0%	➖
primitives/src/xcm	66%	0%	➖
pallets/astar-xcm-benchmarks/src/fungible	100%	0%	✔
precompiles/dispatch-lockdrop/src	89%	0%	✔
pallets/vesting-mbm/src	87%	0%	✔
precompiles/sr25519/src	69%	0%	➖
Summary	73% (3890 / 5359)	0% (0 / 0)	➖

Minimum allowed line rate is 50%