Track EEST EIP-6780 repeated SELFDESTRUCT deviation

[kollegian]

Context

PR #4064 enables upstream Ethereum execution-spec tests against a live Sei devnet. The eip6780-repeated-selfdestruct selection rule currently skips repeated-SELFDESTRUCT vectors that expose a Sei-specific state-transition deviation.

This is an implementation deviation rather than a limitation of EEST remote execution and must remain visible and removable.

Expected behavior

Repeated SELFDESTRUCT operations should produce the Cancun/Prague post-state expected by the upstream EIP-6780 vectors.

Completion criteria

• Reproduce and fix the skipped vector group.
• Run the affected EEST vectors against a clean Sei devnet.
• Remove eip6780-repeated-selfdestruct from integration_test/exec_specs/plugin/eest_plugin.py.