feat(anvil): reset to non fork

[yash-atreya]

Motivation

Closes: #7472

Solution

Implement a new function to reset to a non-fork from a fork.

[yash-atreya]

I think we should add the logic for this into backend.reset_fork() instead of creating a new method

[bauti-defi]

will this enabled avil_reset to roll back a fork to starting block?

[mattsse]

will this enabled avil_reset to roll back a fork to starting block?

this should already be possible if the input is set correctly:

https://hardhat.org/hardhat-network/docs/reference#hardhat_reset

[mattsse]

conceptually this is correct, but it's a bit more complex than this.

we also want some sanity tests for this
that reset and ensure the block number is reset to genesis for example

[mattsse]

this isn't entirely accurate, what we need to consider here is that the node can be in two modes here, forked or mem only.

if mem only we need to reset to the genesis block

if in forked, we need to entirely reinitialize the node block env like this

[yash-atreya]

@mattsse So if the node is in mem mode, we just clear the env like env.clear()?