Add EVM backend support

[smiasojed]

Related to: #294
Flags combination for the forge test command

Flag combination	Compiler	Runtime backend	Target
(default)	solc	REVM	Standard Foundry EVM test
--resolc	resolc, solc	pallet-revive (PVM)	Run PolkaVM backend on pallet-revive
--resolc --polkadot	resolc, solc	pallet-revive (PVM)	Run PolkaVM backend on pallet-revive
--polkadot (without resolc)	resolc, solc	pallet-revive (EVM)	Run EVM backend on pallet-revive

TODO in next PRs:

1. migrate EVM bytecode and set immutables
2. Add vm cheatcodes, probably we should modify also flags

[alexggh]

why are this change needed, they don't seem related to the PR

[smiasojed]

It is reported by clippy

[alexggh]

This part needs updating as well:

foundry-polkadot/crates/forge/src/runner.rs

Line 447 in adb0ab7

revive_strategy::with_externalities(backend, f)

, otherwise --polkadot doesn't work well with forge test.

[alexggh]

Ran this with the tests from #334 and can confirm they are passing with REVM as the backend.

[smiasojed]

This part needs updating as well:

foundry-polkadot/crates/forge/src/runner.rs

Line 447 in adb0ab7

revive_strategy::with_externalities(backend, f)

, otherwise --polkadot doesn't work well with forge test.
thanks, added check for polkadot flag

[pkhry]

i assume that vm.pvm(true) cheatcode no longer serves a purpose?
if i run a test with --resolc(without --polkadot) startup migration is performed anyways.

[smiasojed]

i assume that vm.pvm(true) cheatcode no longer serves a purpose? if i run a test with --resolc(without --polkadot) startup migration is performed anyways.

yes, but it still works. In next PR I will add selection for evm or pvm