Remove ExecV3: Extend BAL test with varied transaction types

## Sub-task of #19318

### Phase 1d: BAL test extension

**File**: `execution/engineapi/engine_api_bal_test.go`

Extend `TestEngineApiGeneratedPayloadIncludesBlockAccessList` with additional transaction types to ensure the refactoring doesn't break BAL tracking:

- Contract creation (code changes tracked in BAL)
- Storage writes via contract calls (storage changes tracked)
- Multiple transaction types in same block

The existing test only covers a simple transfer. Varying the transaction types ensures all BAL tracking paths (balance, nonce, code, storage) produce correct results after the refactoring.