Migrate output schema to V2 (#14311)

Previous refacto was creating output schema V2 which has more specific
schemas based on the step type. Before we were using one common schema,
which was too complex when searching for variable informations.

This PR migrate the deprecated schemas and remove the old code:
- mark previous `BaseOutputSchema` as deprecated
- remove other previous schemas
- use V2 everywhere
- icon should not be stored in schema. Instead it should be generated
based on the fieldmetadata or the item type

packages/twenty-server/src/modules/workflow/workflow-builder/workflow-schema/utils/should-generate-field-fake-value.ts

@@ -6,13 +6,15 @@ const isManyToOneRelationField = (field: FieldMetadataEntity) =>
   (field as FieldMetadataEntity<FieldMetadataType.RELATION>).settings
     ?.relationType === 'MANY_TO_ONE';
 
+const EXCLUDED_SYSTEM_FIELDS = ['searchVector', 'position'];
+
 // TODO refactor
 export const shouldGenerateFieldFakeValue = <T extends FieldMetadataType>(
   field: FieldMetadataEntity<T>,
 ) => {
   return (
     field.isActive &&
-    field.name !== 'searchVector' &&
+    !(EXCLUDED_SYSTEM_FIELDS.includes(field.name) && field.isSystem) &&
     (field.type !== FieldMetadataType.RELATION ||
       isManyToOneRelationField(field as unknown as FieldMetadataEntity))
   );