Do not ban peers after block validation fails for intermittent or internal errors

[SaiProServ]

Right now, we ban peers on every failed block validation ("sent invalid consensus value"). Since #4428, it is possible to be more nuanced in our reaction to these events, as validation failures can also come from internal and temporary failures. The blocking logic should be updated to not ban peers if one of these failures happens.

[wojcik91]

Changes mentioned in the above comment were merged into feat-1.6 and are not present in feat-2.0 branch.

[devendran-m]

Potential 2.1.0 as this can be implemented as a non-breaking change.