unregister(...) optional shouldDirty configuration parameter

[Frantss]

Is your feature request related to a problem? Please describe.
I'm trying to unregister inputs and have them not affect the isDirty and dirtyFields properties.
Currently, after an input is unregistered, it sets isDirty to true.

Describe the solution you'd like
unregisters takes a second argument of type { shouldDirty: boolean }.
This will be a non-braking change, and also provide future proof if more configs need to be added.

Describe alternatives you've considered
Having a removeInput function that removes all references to the input from the state.

[bluebill1049]

proposal:

unregister: (
    name: FieldPath<TFieldValues> | FieldPath<TFieldValues>[],
    options?: Pick<
      KeepStateOptions,
      'keepErrors' | 'keepTouched' | 'keepDirty'
    >,
  ) => void;