feat(exec): skip recoverable invalid transactions

[AshinGau]

Background

follow Galxe/grevm#111, resolve https://github.com/Galxe/gravity-audit/issues/838

Gravity uses pipeline execution: consensus may build the next block before the previous block has been committed by the execution layer. A transaction that passed the consensus-side filter can therefore become invalid against the final execution state—for example, an EIP-7702 delegated call may change another account's nonce before that account's transaction is executed.

Previously, recoverable errors such as nonce mismatch or insufficient balance were returned as block-level execution errors. This could stop block execution and leave the validator without a safe way to handle a transaction that consensus had already included.

Design

This PR adds a last-resort execution-layer safeguard for recoverable invalid transactions:

• grevm classifies a fixed set of recoverable transaction errors and returns TxExecutionOutcome::Skipped(reason).
• If parallel execution encounters one of these errors, grevm rolls back the speculative execution and re-executes the block through its sequential fallback.
• gravity-reth keeps the transaction in the block but applies it as a no-op: no state changes and no gas charged.
• A skipped transaction receives a failed receipt with unchanged cumulative gas and one versioned GravityTxSkipped(uint16,uint16) log.
• The log uses a protocol-reserved emitter address so indexers and operators can reliably identify the transaction and decode its skip reason.
• Unknown transaction errors, database errors, and commit errors remain fatal instead of being silently skipped.
• The disable_grevm path uses the same grevm sequential executor, keeping skipped-transaction semantics identical across both execution modes.

Skipped transactions remain persisted and queryable through Ethereum RPC by transaction hash and receipt. Execution continues with subsequent transactions in the block.

Validation

• Added receipt encoding and decoding tests.
• Added executor tests covering skipped transactions, zero gas usage, unchanged state, and continued execution.
• Added EIP-7702 pipeline end-to-end tests for both parallel grevm and disable_grevm modes.
• Upgraded grevm to the revision that provides recoverable-error classification and sequential fallback behavior.