Investigate issues using the offchain indexing API in pallet ibc

[Wizdave97]

Problem definition

While running integration tests with the relayer, it was noticed that extrinsics that called the offchain api to store packet data offchain were discarded from the transaction pool as Invalid transactions, the same extrinsics were not discarded if their execution did not reach a point where the offchain API was called.
This needs to be fixed because packet data needs to be stored offchain.