EVM - Implement tx queue get content

What

Tx queue get content impl.

Why

Allow Txpool_content.Method when Tx queue is enabled.

How

Map Tx queue content into a Tx pool object.

Summary by CodeRabbit

• New Features

  • Introduced an upper limit on transactions in the transaction queue to enhance transaction management.
  • Updated the transaction pool report to now display distinct lists for pending and queued transactions while ensuring backward compatibility.

• Tests

  • Improved test scenarios to verify that transactions are correctly handled and that the queue is properly cleared after processing events.