## 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/settings.py
]
# Application definition
INSTALLED_APPS = [
    "whitenoise.runserver_nostatic",  # makes sure that whitenoise handles static files in development
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    "posthog.apps.PostHogConfig",
    "rest_framework",
    "loginas",
    "corsheaders",
    "social_django",
    "django_filters",
    "axes",
]
MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "posthog.middleware.AllowIP",
    "django.contrib.sessions.middleware.SessionMiddleware",
    "posthog.middleware.ToolbarCookieMiddleware",
    "corsheaders.middleware.CorsMiddleware",
    "django.middleware.common.CommonMiddleware",
    "posthog.middleware.CsrfOrKeyViewMiddleware",
    "django.contrib.auth.middleware.AuthenticationMiddleware",
    "django.contrib.messages.middleware.MessageMiddleware",
    "django.middleware.clickjacking.XFrameOptionsMiddleware",
    "whitenoise.middleware.WhiteNoiseMiddleware",