fix(forms): allow control state as reset argument for FormGroup

[bougwal]

fix(forms): Allow ControlState as reset arguments for FormGroup/FormRecord

This change also decorelate the reset type argument from TValue by adding a 3rd generic parameter to AbstractControl.
This improves the typings overall.

This PR closes #55577.

[JeanMeche]

See my suggestions.

[JeanMeche]

Thank for the changes Walid !
We'll do some checks against the Google codebase and we'll let you know if we can go forward with the change.

[dylhunn]

We're investigating an issue illustrated by the following snippet:

function valueChangesWrapper<T>(control: AbstractControl<T>) {
  return control.valueChanges;
}
const fg = new FormGroup({foo: new FormControl('')});
fg.valueChanges;
const a = valueChangesWrapper(fg);

Notice that the inferred type of valueChangesWrapper inappropriately includes FormControlState. We think this is due to type unification of FormGroup.reset with AbstractControl.reset.

This is super tricky to debug/understand.

[JeanMeche]

I've allowed myself to push the changes to fix the issues that were brought up by testing the fix against Google's code base.

Basically what happens is that changing the reset() signature had implicationg on the TValue generic of AbstractControl.