Autocompleting block hash is not working

[PabloCastellano]

This new feature used to display decoded data from Optimism Ecotone blobs is not working properly.

Using this tx as example:

Clicking on the "L1 origin block hash" link will redirect to an unexisting block: https://etherscan.io/block/0x47403c9454dd9f02d3698e688b3ce1cca7cc4c7b

Additionally:

• We should not display a link if the hash could not be autocompleted
• Add optimism example tx data with decoded fields to our fixtures data
• If we can successfully autocomplete the L1 origin block, it means we have it in our own db. In that case, we can link to that block on Blobscan instead of Etherscan.
• Add a link to the “Last L1 origin number” and redirect to Blobscan or Etherscan based on the same condition.