Remove chain-extension-trait package

[akru]

Pull Request Summary

The purpose of this PR is

• remove cross-links between CE implementations trough chain-extension-trait package;
• optimize CE definition on runtime level (linked PR)

The problem is when we trying to development new CE usually we doing following steps:

1. fork development branch;
2. add dependency with new package pointed into development branch.

But, linking all CE to same Trait package makes requirement for all CE use it, and use it with same source, that means touch one CE requires repoint all CEs to development branch. It looks inconvenient in terms of independent development for may CEs. The purpose of this PR is making CE development more independent.

Dapps Staking CE 1.1

This PR aslo includes some code optimizations for dapps-staking CE. Contract type was removed and used runtime-level converters from [u8; 32] to SmartContract types. It looks much more safe rather than hacks with codec, runtime level converter is trivial and looks much more like trait-driven programming.

So, instead of byte manipulations hacks we just make requirement to have From<[u8; 32]> trait impl somewhere (usually where SmartContract type defined).

Check list

• [ ] added unit tests
• [ ] updated documentation

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
chain-extensions/xvm/src	0%	0%	❌
precompiles/substrate-ecdsa/src	78%	0%	➖
precompiles/utils/macro/tests	0%	0%	❌
frame/dapps-staking/src/pallet	90%	0%	✔
frame/xc-asset-config/src	70%	0%	➖
precompiles/dapps-staking/src	93%	0%	✔
frame/pallet-xvm/src/pallet	37%	0%	❌
precompiles/utils/src	72%	0%	➖
precompiles/sr25519/src	79%	0%	➖
chain-extensions/types/rmrk/src	0%	0%	❌
frame/dapps-staking/src	83%	0%	✔
precompiles/utils/src/data	72%	0%	➖
chain-extensions/types/xvm/src	0%	0%	❌
precompiles/xvm/src	89%	0%	✔
primitives/xcm/src	68%	0%	➖
frame/collator-selection/src	80%	0%	✔
frame/custom-signatures/src	57%	0%	➖
precompiles/assets-erc20/src	73%	0%	➖
frame/pallet-xvm/src	9%	0%	❌
frame/pallet-xcm/src	65%	0%	➖
precompiles/utils/macro/src	0%	0%	❌
precompiles/xcm/src	84%	0%	✔
frame/block-reward/src	85%	0%	✔
contracts/xvm/src	0%	0%	❌
chain-extensions/rmrk/src	0%	0%	❌
chain-extensions/dapps-staking/src	0%	0%	❌
chain-extensions/types/dapps-staking/src	0%	0%	❌
Summary	60% (2572 / 4291)	0% (0 / 0)	➖

Minimum allowed line rate is 50%