Add Status for "Message has been relayed"

[MSilb7]

When I search an L2 transaction hash that has already been relayed, I see a status "Status at index 0: Message is ready to be relayed"

This leads to some confusion when I'm not sure what the last message I relayed was (this requires checking finalized withdrawals on L1).

it would be helpful to have a status "This message was relayed in has: 0x.... on xyz date"