Clone environment fails to associate new feature segments with new feature states

Sentry Issue: [FLAGSMITH-API-35D](https://flagsmith.sentry.io/issues/4337123971/?referrer=github_integration)

```
ForeignKeyViolation: insert or update on table "features_featurestate" violates foreign key constraint "features_featurestat_feature_segment_id_547d5f48_fk_features_"
DETAIL: Key (feature_segment_id)=(37855) is not present in table "features_featuresegment".

File "django/db/backends/base/base.py", line 242, in _commit
return self.connection.commit()

IntegrityError: insert or update on table "features_featurestate" violates foreign key constraint "features_featurestat_feature_segment_id_547d5f48_fk_features_"
DETAIL: Key (feature_segment_id)=(37855) is not present in table "features_featuresegment".

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...
File "environments/views.py", line 142, in clone
clone = serializer.save(source_env=self.get_object())
File "environments/serializers.py", line 121, in create
clone = source_env.clone(name)
File "environments/models.py", line 171, in clone
feature_state.clone(clone, live_from=feature_state.live_from)
File "features/models.py", line 574, in clone
clone.save()
```