Experimental: simulateTransaction - support innerInstructions

[mcintyre94]

See #2756 that adds it to the legacy web3js 1.x code

Motivation

• innerInstructions is available as an optional param on simulateTransaction RPC calls from 1.18
• There's an open PR adding support for the 1.x connection.simulateTransaction code
• We should also add it to the 2.x simulateTransaction RPC type

Details

• New innerInstructions: boolean optional input config field
• If this is true, then a new innerInstructions field is included. The docs say that this is jsonParsed when possible, otherwise json. I think this means it doesn't involve the encoding param.
• We'll be able to re-use type structures from feat(simulated_transaction): Add Inner Instructions #2756
• This is only available on 1.18 RPCs, and is ignored by earlier versions.