For example I have this 3 fields as question_set, question and folder.
I need to assign all of this fields into raw_id_fields inside the admin.ModelAdmin without add manually per-single fields.

the basic way to enable raw id fields inside the admin.ModelAdmin look like this;

@admin.register(QuestionList, site=admin_site)
class QuestionListAdmin(admin.ModelAdmin):
    raw_id_fields = ('question_set', 'question', 'folder')    # manually

But, can I setup all that OneToOneField and ForeignKey fields automatically into raw_id_fields without add it manually?
such as applying the class mixin? sure can, to do it you can inspect the model,
and search through the fields for instances of ForeignKey,
and add the name to the tuple, for example with:

class DefaultAdminMixin:
    """
    class mixin to setup default `raw_id_fields` and `search_fields`.
    """
    raw_id_fields = ()
    search_fields = ()

    def __init__(self, model, admin_site, *args, **kwargs):
        self.raw_id_fields = self.setup_raw_id_fields(model)
        self.search_fields = self.setup_search_fields(model)
        super().__init__(model, admin_site, *args, **kwargs)

    def setup_raw_id_fields(self, model):
        return tuple(
            f.name
            for f in model._meta.get_fields()
            if isinstance(f, ForeignKey) or isinstance(f, OneToOneField)
        )

    def setup_search_fields(self, model):
        return tuple(
            f.name
            for f in model._meta.get_fields()
            if isinstance(f, CharField) or isinstance(f, TextField)
        )

A OneToOneField is a subclass of a ForeignKey, so there is no need to make search for a OneToOneField.
and to implement it, you can follow this below example;

@admin.register(QuestionList, site=admin_site)
class QuestionListAdmin(DefaultAdminMixin, admin.ModelAdmin):
    pass
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