Fix empty trigger on readonly + fix cache apollo on deactivation (#9912)

- On deactivation, we should not need to refresh so the workflow
disappear from cmd+k


https://github.com/user-attachments/assets/826fa4c6-3faa-49d1-b180-ed5d3ed187e5

- When readonly, step empty, we should not see the right drawer


https://github.com/user-attachments/assets/b557ef61-da81-446d-b160-f26c4c7a5191

packages/twenty-front/src/modules/workflow/workflow-steps/components/WorkflowStepDetail.tsx

@@ -48,18 +48,12 @@ export const WorkflowStepDetail = ({
     stepId,
     workflowVersion,
   });
-  if (!isDefined(stepDefinition)) {
+  if (!isDefined(stepDefinition) || !isDefined(stepDefinition.definition)) {
     return null;
   }
 
   switch (stepDefinition.type) {
     case 'trigger': {
-      if (!isDefined(stepDefinition.definition)) {
-        throw new Error(
-          'Expected the trigger to be defined at this point. Ensure the trigger has been set with a default value before trying to edit it.',
-        );
-      }
-
       switch (stepDefinition.definition.type) {
         case 'DATABASE_EVENT': {
           return (