Fix import of TimeGranularity enum in filter_renderer.py

This import worked because there is a time_granularity file in MetricFlow
and it imports TimeGranularity from dbt_semantic_interfaces (thus making
it available). However importing it from MetricFlow in dbt_semantic_interfaces
was problematic for multiple reasons
1) It created a circular dependency, and the ProcessPoolExecutor or model
validator freaked out about this
2) dbt_semantic_interfaces cannot depend on MetricFlow

dbt_semantic_interfaces/dbt_semantic_interfaces/objects/where_filter/filter_renderer.py

@@ -5,7 +5,7 @@
 import jinja2
 
 from dbt_semantic_interfaces.references import DimensionReference, EntityReference
-from metricflow.time.time_granularity import TimeGranularity
+from dbt_semantic_interfaces.objects.time_granularity import TimeGranularity
 
 
 @dataclass(frozen=True)