Emit trace events as they happen instead of storing them

[SamWilsn]

As recommended by @holiman on holiman/goevmlab#131 (comment) and @MariusVanDerWijden on discord, we shouldn't be storing EVM trace events longer than necessary.

For example, we'd need to change this:

execution-specs/src/ethereum_spec_tools/evm_tools/t8n/evm_trace.py

Line 207 in 8fad0e6

evm.env.traces.append(new_trace)

And remove this:

execution-specs/src/ethereum/shanghai/vm/__init__.py

Line 47 in 119208c

traces: List[dict]