## Bug description

strtobool is used in several places where it will cause deprecation warning in Pythin 3.10 and error in Python 3.12 since distutils will be removed in Python 3.12 .

Reference : https://www.python.org/dev/peps/pep-0632/

```
rg distutils                     
posthog/api/annotation.py
1:from distutils.util import strtobool

posthog/api/dashboard.py
2:from distutils.util import strtobool

posthog/api/insight.py
1:from distutils.util import strtobool

posthog/models/filters/mixins/common.py
4:from distutils.util import strtobool

posthog/settings.py
17:from distutils.util import strtobool
```

## Expected behavior

It's a good idea to vendor in the function as it's a short one.

## Environment

- [ ] PostHog Cloud
- [ ] self-hosted PostHog, version/commit: _please provide_


#### *Thank you* for your bug report – we love squashing them!

posthog/models/filters/mixins/common.py
if self._date_to:
            if isinstance(self._date_to, str):
                return relative_date_parse(self._date_to)
            else:
                return self._date_to
        return timezone.now()
    @cached_property
    def date_filter_Q(self) -> Q:
        date_from = self.date_from
        if self._date_from == "all":
            return Q()
        if not date_from:
            date_from = timezone.now().replace(hour=0, minute=0, second=0, microsecond=0) - relativedelta(days=7)
        filter = Q(timestamp__gte=date_from)
        if self.date_to:
            filter &= Q(timestamp__lte=self.date_to)
        return filter
    def custom_date_filter_Q(self, field: str = "timestamp") -> Q:
        date_from = self.date_from
        if self._date_from == "all":
            return Q()
        if not date_from:
            date_from = timezone.now().replace(hour=0, minute=0, second=0, microsecond=0) - relativedelta(days=7)
        filter = Q(**{"{}__gte".format(field): date_from})
        if self.date_to:
            filter &= Q(**{"{}__lte".format(field): self.date_to})
        return filter
    @include_dict
    def date_to_dict(self) -> Dict: