Disable the txpool_content and eth_getTransactionCount json-rpc method and eth_newPendingTransaction stream when running auctioneer mode

[bharath-123]

Rationale

We do not want searchers to peek into other searcher bids. They can easily do this using the txpool_content json-rpc method and also using the eth_newPendingTransaction stream.

[bharath-123]

To achieve this behaviour, we can disable the txpool http api and ws apis from the cmdline flag. To do this, we can do the following:

1. Omit the txpool api from the --http.api flag.
2. Disable websocket connections by removing the --ws flag.
   Refer to https://geth.ethereum.org/docs/fundamentals/command-line-options for more information.