Assets-pallet chain-extension

[PierreOssun]

Pull Request Summary

This PR is rebase from v0.9.37 and close previous #127

---

This PR adds a 1 on 1 map of pallet-assets functions to chain-extension. For each extrinsic:

• charge the weight before entering the pallet call
• the origin signer is defined by an Origin enum that takes either Caller or Contract as value. This way the contract can chose between making call on behalf of the caller or on behalf of itself
• return a Retval (0 for success or an error number that will be decoded on contract side)

integrations tests here: https://github.com/AstarNetwork/chain-extension-contracts/pull/11

Check list

• [x] implemented chain-extension

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
chain-extensions/types/dapps-staking/src	0%	0%	❌
chain-extensions/types/xvm/src	0%	0%	❌
frame/block-reward/src	82%	0%	✔
frame/custom-signatures/src	52%	0%	➖
frame/pallet-xvm/src/pallet	33%	0%	❌
frame/xc-asset-config/src	68%	0%	➖
precompiles/assets-erc20/src	76%	0%	➖
precompiles/dapps-staking/src	93%	0%	✔
frame/contracts-migration/src	0%	0%	❌
precompiles/utils/macro/src	0%	0%	❌
precompiles/utils/src	72%	0%	➖
frame/pallet-xcm/src	64%	0%	➖
frame/dapps-staking/src	89%	0%	✔
precompiles/xcm/src	84%	0%	✔
primitives/xcm/src	64%	0%	➖
precompiles/utils/src/data	72%	0%	➖
frame/dapps-staking/src/pallet	87%	0%	✔
frame/collator-selection/src	80%	0%	➖
chain-extensions/dapps-staking/src	0%	0%	❌
chain-extensions/types/assets/src	0%	0%	❌
precompiles/sr25519/src	79%	0%	➖
chain-extensions/pallet-assets/src	0%	0%	❌
chain-extensions/xvm/src	0%	0%	❌
precompiles/substrate-ecdsa/src	78%	0%	➖
frame/pallet-xvm/src	11%	0%	❌
precompiles/xvm/src	94%	0%	✔
precompiles/utils/macro/tests	0%	0%	❌
Summary	62% (2588 / 4187)	0% (0 / 0)	➖

Minimum allowed line rate is 50%