Update next step ids on step update (#11605)

When inserting a new step between step 1 et step 2, then step 1 should
have the new step as next step id, add stop having step 2.

When deleting a step, we link the parent and next steps together. It may
change in the future

packages/twenty-front/src/generated/graphql.tsx

@@ -411,6 +411,10 @@ export type CreateServerlessFunctionInput = {
 };
 
 export type CreateWorkflowVersionStepInput = {
+  /** Next step ID */
+  nextStepId?: InputMaybe<Scalars['String']>;
+  /** Parent step ID */
+  parentStepId?: InputMaybe<Scalars['String']>;
   /** New step type */
   stepType: Scalars['String'];
   /** Workflow version ID */