feat: add a wrapper for BestTransactions prioritizing given senders

[klkvr]

Adds a type that wraps inner BestTransactions implementation and yields transactions from selected senders first until a certain gas limit cap.

[mattsse]

this will work.

one nit

[mattsse]

we also need to remove all entries in the buffer, here I think?

[klkvr]

invalid transaction would already be not there so it would make sense to only remove transactions that depend on it, however, we don't yet have this logic in primary BestTransactions impl

i.e we just insert it but no transactions from all or independent are getting removed

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

Lines 96 to 98 in abeec83

	pub(crate) fn mark_invalid(&mut self, tx: &Arc<ValidPoolTransaction<T::Transaction>>) {
	self.invalid.insert(*tx.hash());
	}

should we fix it?

[mattsse]

we just insert it but no transactions from all or independent are getting removed

oh, you're right. I'll open a good first issue for this then