feat(`anvil`): add `eth_sendBundle` for MEV-related integration tests

[Theo-]

Component

Anvil

Describe the feature you would like

eth_sendBundle has become a very used primitive for MEV-aware application such as Private Mempool, block builders, snipers, etc.

Being able to test this feature using Anvil would close the loop on a bunch of our integration tests.

Specs: https://docs.flashbots.net/flashbots-auction/advanced/rpc-endpoint

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_sendBundle",
  "params": [
    {
      txs,               // Array[String], A list of signed transactions to execute in an atomic bundle
      blockNumber,       // String, a hex encoded block number for which this bundle is valid on
      minTimestamp,      // (Optional) Number, the minimum timestamp for which this bundle is valid, in seconds since the unix epoch
      maxTimestamp,      // (Optional) Number, the maximum timestamp for which this bundle is valid, in seconds since the unix epoch
      revertingTxHashes, // (Optional) Array[String], A list of tx hashes that are allowed to revert
      replacementUuid,   // (Optional) String, UUID that can be used to cancel/replace this bundle
    }
  ]
}

Additional context

https://docs.flashbots.net/flashbots-auction/advanced/rpc-endpoint