Sentry Issue: [POSTHOG-35A](https://sentry.io/organizations/posthog/issues/2487828485/?referrer=github_integration)

```
AttributeError: can't set attribute
  File "rest_framework/views.py", line 506, in dispatch
    response = handler(request, *args, **kwargs)
  File "ee/clickhouse/views/insights.py", line 69, in funnel
    response = self.calculate_funnel(request)
  File "posthog/decorators.py", line 47, in wrapper
    result = f(*args, **kwargs)
  File "ee/clickhouse/views/insights.py", line 80, in calculate_funnel
    filter.funnel_viz_type = FunnelVizType.TRENDS
```
posthog/models/filters/mixins/funnel.py
from typing import Optional
from posthog.constants import (
    FUNNEL_FROM_STEP,
    FUNNEL_ORDER_TYPE,
    FUNNEL_STEP,
    FUNNEL_TO_STEP,
    FUNNEL_VIZ_TYPE,
    FUNNEL_WINDOW_DAYS,
    FunnelOrderType,
    FunnelVizType,
)
from posthog.models.filters.mixins.base import BaseParamMixin
from posthog.models.filters.mixins.utils import cached_property, include_dict
class FunnelFromToStepsMixin(BaseParamMixin):
    @cached_property
    def funnel_from_step(self) -> Optional[int]:
        if self._data.get(FUNNEL_FROM_STEP):
            return int(self._data[FUNNEL_FROM_STEP])
        return None
    @cached_property
    def funnel_to_step(self) -> Optional[int]: