[RPC] Our RPC server is unmaintained

## Red version
3.5.0.dev1

## Description
Our RPC server library, `aiohttp-json-rpc`, found on [PyPi](https://pypi.org/project/aiohttp-json-rpc) and [GitHub](https://github.com/pengutronix/aiohttp-json-rpc) has been marked as archived on GitHub and therefore is unmaintained.

This is not so important with #4381 but as this is a dependency with networking I guess there is a heightened risk of a security vulnerability, though I am not the expert on this matter/best practices with unmaintained stuff.

## Proposed solution
Idk. Accept it until ZMQ? Move to another library? Also as I'm not using a template why did I make this heading when I don't have much to say lol.