Eth API: Trace selfdestructs in the Ethereum JSON-RPC trace_block output

[Stebalien]

We don't currently trace "selfdestruct" events in the Ethereum JSON-RPC trace_block output, but we probably should for feature completeness. To do this, we'll need to implement both of:

• Expose intermediate state ref-fvm#1994
• Trace final actor state ref-fvm#1995

Then, every time we see an EVM actor invoked, we can lookup the "after" state to determine if it selfdestructed.

Unfortunately, there's no reliable way to do this simply by looking at the state at the end of a block because an EVM smart contract can selfdestruct and revive multiple times.