ObjectMetadataServiceV2.deleteOne (#13871)

# Introduction
- Implementing the delete one for the new object metadata service v2.
- Handling relation fields and fields in the first place to finally
remove the object
- puting back updatedAt and createdAt in flat metadatas
- duplicate criteria addition for flat object
- removing datasource id from object metadata dto

packages/twenty-server/src/engine/metadata-modules/flat-object-metadata/__mocks__/get-flat-object-metadata.mock.ts

@@ -9,6 +9,8 @@ type FlatObjectMetadataOverrides = Required<
 export const getFlatObjectMetadataMock = (
   overrides: FlatObjectMetadataOverrides,
 ): FlatObjectMetadata => {
+  const createdAt = new Date();
+
   return {
     flatFieldMetadatas: [],
     flatIndexMetadatas: [],
@@ -33,6 +35,9 @@ export const getFlatObjectMetadataMock = (
     standardOverrides: null,
     targetTableName: '',
     workspaceId: faker.string.uuid(),
+    createdAt,
+    updatedAt: createdAt,
+    duplicateCriteria: null,
     ...overrides,
   };
 };