EIP-6780 Selfdestruct

Documentation for tests/cancun/eip6780_selfdestruct.

Generate fixtures for these test cases for Cancun with:

Cancun only:

fill -v tests/cancun/eip6780_selfdestruct --fork=Cancun --evm-bin=/path/to/evm-tool-dev-version

For all forks up to and including Cancun:

fill -v tests/cancun/eip6780_selfdestruct --until=Cancun --evm-bin=/path/to/evm-tool-dev-version

Tests for EIP-6780: SELFDESTRUCT only in same transaction.