override senders

[zeroXbrock]

Is your feature request related to a problem? Please describe.

Want to be able to send all transactions from one account to bypass the funding phase.

Describe the solution you'd like

• Add a flag to ScenarioSendTxsCliArgs: override_senders: bool
• if this flag is set:
  • skip the funding steps in setup and spam
  • replace all from_pool declarations in the scenario config with from declarations at runtime, taking the from address of the first signer given by -p (or the default account)

Additional context

Waiting for a funding step before spamming requires us to target a chain which has blocks being actively built (which is not always the case). This allows us to send spam transactions immediately, which has its uses.

[varun-doshi]

I would like to take this up if its available

[zeroXbrock]

thanks @varun-doshi -- it's all yours!