feat(cast): trace and debug on local contracts

[fnerdman]

Motivation

Using cast run and cast call to trace and debug can currently only fetch abi and source from explorers such as etherscan. In situations where no explorer is available, it would be intuitive to use the abi and source provided by the local files.

Solution

As with forge debug - using local files is preferred over fetching data from remote explorer. Only if etherscan_api_key is defined, will we fetch abi and source from the explorer.
Without explorer it will now compile solidity files and fetch contract bytecode from build output. To identify contract addresses it fetches on chain bytecode via RPC call. Most of the required code change happens in handle_traces, where the decoder and debugger is fed with the required data fetched from local files (and RPC).

Unresolved issues

• Debugging on inherited contracts does not resolve to the respective source code.
• Can we use existing build artifacts instead of running the builder each time? This also solves the problem where the building source requires additional parameters.

[Ruteri]

Related issues: #5435, #5410, #4440, #3498

[emo-eth]

#7058 should fix inherited sourcemaps 🫡