Add Txpool functions to retrieve txs by state and origin

[mattsse]

Describe the feature

we have functions to retrieve txs by state:

reth/crates/transaction-pool/src/traits.rs

Line 274 in 8a802da

fn pending_transactions(&self) -> Vec<Arc<ValidPoolTransaction<Self::Transaction>>>;

we also want convenience functions to get txs by origin TransactionOrigin

TODO

• add convenience functions similar to
  

  reth/crates/transaction-pool/src/traits.rs

  Lines 347 to 350 in 8a802da

  	/// Returns all transactions that where submitted as [TransactionOrigin::Local]
  	fn get_local_transactions(&self) -> Vec<Arc<ValidPoolTransaction<Self::Transaction>>> {
  	self.get_transactions_by_origin(TransactionOrigin::Local)
  	}

  
  but for pending or queued

Additional context

No response

[mvares]

@mattsse, I'm having one problem:

    pub(crate) fn get_pending_tx(
        &self,
        origin: TransactionOrigin,
    ) -> Vec<Arc<ValidPoolTransaction<<V as TransactionValidator>::Transaction>>> {
        self.pending_transactions().iter().filter(|tx| tx.origin == origin).collect()
    }

my IDE is hiting an error about the result type. I think is about collect()

[mattsse]

I think just Self::Transaction is sufficient

but this be implemented natively for perf reasons