fix(transaction-service): 🐛 Fix transactions stuck in Linea mempool

[TheDivic]

📖 Context

Type of change

• Non-breaking change (backwards compatible)

Why are we doing this?

• Every few transactions on Linea would get stuck forever in the mempool so we would have to call the /admin/cancel endpoint to cancel them.
• If a relayer transaction get stuck the relayer basically goes out of service. If enough relayers go out of service, Linea goes down.

What did we do?

• Linea released a custom RPC endpoint linea_estimateGas which is not fully EVM compatible. See: https://docs.linea.build/developers/reference/api/linea-estimategas
• Added support for that RPC call when sending transactions.
• Updated viem to latest version so I can use the viem/linea package.
• 🚨 Didn't add that to validation and simulation, pushed a hotfix to unblock our clients. This is tech debt.

How Has This Been Tested?

• Gasless transfer
• Mint NFT
• 🚨 I noticed that most of our transactions are getting frontran now, we're in communication with the Linea team to try and fix it.