fix(forms): temp roll back breaking change with min/max directives

With 4.2, we introduced the min and max validator directives. This was actually a breaking change because
their selectors could include custom value accessors using the min/max properties for their own purposes.

For now, we are rolling back the change by removing the exports.

Closes #17491.

packages/forms/src/directives.ts

@@ -58,9 +58,7 @@ export const SHARED_FORM_DIRECTIVES: Type<any>[] = [
   NgControlStatus,
   NgControlStatusGroup,
   RequiredValidator,
-  MinValidator,
   MinLengthValidator,
-  MaxValidator,
   MaxLengthValidator,
   PatternValidator,
   CheckboxRequiredValidator,