CI: local iota network setup to enable tests

### Feature description

Setup a local IOTA network so that we can test features against it.

### Motivation

Without a local network the only way to test our code is against a public network, which makes things harder (fauceting, rate-limits, etc)

### Requirements

tests should be able to connect to a local network (http://localhost:9000) and local faucet.

### Open questions

_No response_

### Are you planning to do it yourself in a pull request?

Yes

Start by locating the repository's CI configuration and the tests that currently use a public network. Determine how a local IOTA network and faucet can be started and exposed at http://localhost:9000. Done means the tests connect to the local network and faucet without relying on public-network access.

Written by the indexing model from the issue text.