Allow `dry_run` endpoint customization of all executor-related parameters

[xgreenx]

It includes:

• Coinbase contract id
• Block time
• Gas price

[netrome]

There's some more info and discussion on this in this closed duplicate issue: #2207

[MitchTurner]

I think we are missing specifics on what this would look like, but what I'm picking up is we extend the GraphQL Mutation to include optional parameters.