change(rpc): Avoid re-verifying transactions in blocks if those transactions are in the mempool

[arya2]

Motivation

We want the transaction verifier to avoid re-verifying transactions for the block verifier that have already been verified for the mempool.

This is a draft PR as it still needs tests.

Depends-On: #8857.
Closes #5674.

Solution

• Adds transaction_hash and known_outpoint_hashes fields on transaction::Request::Block.
• Adds a mempool request for querying a transaction and its dependencies by its mined id
• Adds and calls a try_find_verified_unmined_tx() method on the transaction verifier which queries the mempool for the transaction, then checks that all of its dependencies are present in the set of known_outpoint_hashes.

Tests

This PR still needs tests.

PR Author's Checklist

• The PR name will make sense to users.
• The PR provides a CHANGELOG summary.
• The solution is tested.
• The documentation is up to date.
• The PR has a priority label.

PR Reviewer's Checklist

• The PR Author's checklist is complete.
• The PR resolves the issue.