staking: return full validators' description

[Pitasi]

The Description struct defined here:
https://github.com/cosmos/evm/blob/main/precompiles/staking/StakingI.sol#L28-L34
is only used when creating new validator

The queries only return a string description (corresponding to Description.details field), here:
https://github.com/cosmos/evm/blob/main/precompiles/staking/StakingI.sol#L51-L63

I think that the staking precompile should be changed to return the same Description struct from queries such as validator and validators.

[linear]

EVM-312 staking: return full validators' description

[aljo242]

Thanks for opening this! I think this makes sense - would you like to contribute a PR? 🙂

[Pitasi]

sure, will do!