feat(cheatcodes): ensure vm.difficulty and vm.prevrandao fail if not using the correct EVM Version
#4904
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Motivation
Right now, the
vm.difficulty/vm.prevrandaojust do not work if the correct EVM version is not being used and give no warnings. See foundry-rs/forge-std#373Solution
Make them completely fail if not using the correct EVM version, to avoid unexpected behavior during tests.
Feel free to nit over the fail message!