Add invariant testing filter for excludeSelectors()

[horsefacts]

Component

Forge

Describe the feature you would like

Most of the invariant test filter helpers have both target and exclude variants to include or filter contracts/senders/selectors from fuzzing. But there's no corresponding excludeSelectors for targetSelectors.

It's probably a safer practice to start by excluding selectors from invariant test handler contracts to avoid forgetting a function or two for large handlers, so it would be useful to have support for excludeSelectors.

[Rubilmax]

This would be very helpful