update cleaning job to progressively delete metadata (#14596)

Workspace cleaning jobs slow down the db each hours when running. We
suspect the object metadata deleting query with all cascade/depending
entities (field, index, ..) to be the cause.

packages/twenty-server/src/engine/workspace-manager/__tests__/workspace-manager.service.spec.ts

@@ -29,7 +29,6 @@ describe('WorkspaceManagerService', () => {
   let objectMetadataService: ObjectMetadataService;
   let workspaceMigrationRepository: Repository<WorkspaceMigrationEntity>;
   let dataSourceRepository: Repository<DataSourceEntity>;
-  let workspaceFieldMetadataRepository: Repository<FieldMetadataEntity>;
   let workspaceDataSourceService: WorkspaceDataSourceService;
   let roleTargetsRepository: Repository<RoleTargetsEntity>;
   let roleRepository: Repository<RoleEntity>;
@@ -155,9 +154,6 @@ describe('WorkspaceManagerService', () => {
     dataSourceRepository = module.get<Repository<DataSourceEntity>>(
       getRepositoryToken(DataSourceEntity),
     );
-    workspaceFieldMetadataRepository = module.get<
-      Repository<FieldMetadataEntity>
-    >(getRepositoryToken(FieldMetadataEntity));
     workspaceDataSourceService = module.get<WorkspaceDataSourceService>(
       WorkspaceDataSourceService,
     );
@@ -177,9 +173,6 @@ describe('WorkspaceManagerService', () => {
     it('should delete all the workspace metadata tables and workspace schema', async () => {
       await service.delete('workspace-id');
       expect(objectMetadataService.deleteObjectsMetadata).toHaveBeenCalled();
-      expect(workspaceFieldMetadataRepository.delete).toHaveBeenCalledWith({
-        workspaceId: 'workspace-id',
-      });
       expect(workspaceMigrationRepository.delete).toHaveBeenCalledWith({
         workspaceId: 'workspace-id',
       });