[Refactor]: Defining a interface keeper for a precompile struct

[nowooj]

Problem

Currently, precompile structs are defined as actual keepers, which makes them unusable in extended keepers or modified modules.

Closing criteria

Redefining the keeper of a precompile struct as an interface.

Problem details

If you define an interface for the functions used in the module, like types in other modules of cosmos-sdk, and the Precompile struct has the interface keeper, the extensibility of the module will increase.

[linear]

EVM-185 [Refactor]: Defining a interface keeper for a precompile struct

[aljo242]

Hey thanks for opening this issue! feel free to open a PR implementing this 🙂

[yoosah]

Hi @aljo242 , I've finished the refactoring for this issue and have prepared the code based on both the main and release branches.
based release/v0.3.x: https://github.com/xpladev/evm/tree/refactor/define-keeper-interface
based main: https://github.com/xpladev/evm/tree/refactor/define-keeper-interface-main
Which branch should I target for the pull request?
I make a pr to main branch #477