Precompile Contract Improvements

[ceyonur]

Currently stateful precompile package suffers several issues

• Circular Import Hell with params package
• instead of using getByKey we can try to use addresses to fetch precompile configurations
• each precompile contract should have their own package with specific unit tests. Currently all precompile unit tests are in the same file
• we should reduce places where we need to put precompile key (indicated by `"ADD YOUR PRECOMPILE HERE") in the codebase.

[0xJohnnyGault]

Caddy has a nice plugin architecture they use that would be a great model for precompiles to follow, if you need some inspiration.

https://caddyserver.com/docs/extending-caddy