fix: selfdestruct should not "send to a burn address", but _really_ burn tokens

[enitrat]

The fix implemented in https://github.com/kkrt-labs/keth/pull/235/files is relative to the C4 audit of the Kakarot Codebase. As we're not bounded to a Starknet environment with Keth, we should not be sending eth to a "burn address" (which will make any EVM tx unprovable due to a wrong state update) but rather simply delete the balance of the sender.