fix workspace-member deletion with existing attachments/documents (#5232)

## Context
We have a non-nullable constraint on authorId in attachments and
documents, until we have soft-deletion we need to handle deletion of
workspace-members and their attachments/documents.
This PR introduces pre-hooks to deleteOne/deleteMany
This is called when a user deletes a workspace-member from the members
page

Next: needs to be done on user level as well. This is called when users
try to delete their own accounts. I've seen other issues such as
re-creating a user with a previously used email failing.

packages/twenty-server/src/modules/connected-account/query-hooks/blocklist/blocklist-update-many.pre-query.hook.ts

@@ -1,4 +1,4 @@
-import { Injectable } from '@nestjs/common';
+import { Injectable, MethodNotAllowedException } from '@nestjs/common';
 
 import { WorkspacePreQueryHook } from 'src/engine/api/graphql/workspace-query-runner/workspace-pre-query-hook/interfaces/workspace-pre-query-hook.interface';
 
@@ -7,6 +7,6 @@ export class BlocklistUpdateManyPreQueryHook implements WorkspacePreQueryHook {
   constructor() {}
 
   async execute(): Promise<void> {
-    throw new Error('Method not implemented.');
+    throw new MethodNotAllowedException('Method not allowed.');
   }
 }