chore: WIP - don't show or save flows that don't have copy

pushing this up to get feedback. will revert / redo these changes after
getting more consensus on desired behavior.

benefits/core/models/enrollment.py

@@ -264,7 +264,7 @@ def in_person_eligibility_context(self):
         return eligibility[system_name].dict() if system_name in eligibility.keys() else {}
 
     def clean(self):
-        template_errors = []
+        errors = []
 
         if self.transit_agency:
             templates = [
@@ -282,10 +282,14 @@ def clean(self):
             # so just create directly for a missing template
             for t in templates:
                 if not template_path(t):
-                    template_errors.append(ValidationError(f"Template not found: {t}"))
+                    errors.append(ValidationError(f"Template not found: {t}"))
 
-        if template_errors:
-            raise ValidationError(template_errors)
+            if EnrollmentMethods.IN_PERSON in self.supported_enrollment_methods:
+                if not self.in_person_eligibility_context:
+                    errors.append(ValidationError(f"In-person eligibility context not found for: {self.system_name}"))
+
+        if errors:
+            raise ValidationError(errors)
 
     def eligibility_form_instance(self, *args, **kwargs):
         """Return an instance of this flow's EligibilityForm, or None."""

benefits/in_person/forms.py

@@ -30,7 +30,7 @@ def __init__(self, agency: models.TransitAgency, *args, **kwargs):
 
         self.classes = "in-person-eligibility-form"
         flow_field = self.fields["flow"]
-        flow_field.choices = [(f.id, f.label) for f in flows]
+        flow_field.choices = [(f.id, f.label) for f in flows if self.get_policy_details(f)]
         flow_field.widget.attrs.update({"data-custom-validity": self.flow_field_error_message})
 
         # dynamically add a BooleanField for each flow