Remove a tx from the txpool when its score is below a configurable value

[fab-10]

Description

#7359 introduced a score for txs in the poll, but txs are never removed even if their score reached the min value, in some cases it could be useful to have a way to tell to the txpool to just remove txs after their score is below a configurable value, that basically means that the tx was tried for block inclusion a certain number of times without success, so removing it could prevent future resource waste.