feat: retryable dashboard should also accept L2 tx hash

[dewanshparashar]

Currently, we can only plug in the L1 tx hash. But would be cool if we could also use the other one. (use subgraphs as it's already being done in the monitoring channel)

[spsjvc]

Closing this as it's gonna be done through https://github.com/OffchainLabs/retryable-tx-panel/issues/50