[ETHEREUM-CONTRACTS] Superfluid host: allow batchcall operations to fail

[hellwolf]

Continue from #1895

• Allow fail

 struct Operation2 {
     // Operation type. Defined in BatchOperation (Definitions.sol)
     uint32 operationType;
     // Operation target
     address target;
     // Allow the operation fail for unspecified reasons
     bool allowFail;
     // Data specific to the operation
     bytes data;
 }
 ```
 - batchCall2
 - forwardBatchCall2