Deprecate ObjectMetadataInterface and improve entity typing (#13310)

# Introduction
Following `FieldMetadataInterface` deprecation in
https://github.com/twentyhq/twenty/pull/13264
As for the previous PR will rename and remove all the file in a
secondary PR to avoid conflicts and over loading this one

## Improvements
Removed optional properties from the `objectMetadataEntity` model and
added utils to retrieve test data

## Notes
By touching to `ObjectMetadataDTO` I would have expected a twenty-front
codegenerated types mutation, but it does not seem to be granular enough
to null/undefined coercion

packages/twenty-server/test/integration/metadata/suites/agent/utils/agent-tool-test-utils.ts

@@ -13,6 +13,7 @@ import { ObjectMetadataService } from 'src/engine/metadata-modules/object-metada
 import { RoleEntity } from 'src/engine/metadata-modules/role/role.entity';
 import { WorkspacePermissionsCacheService } from 'src/engine/metadata-modules/workspace-permissions-cache/workspace-permissions-cache.service';
 import { TwentyORMGlobalManager } from 'src/engine/twenty-orm/twenty-orm-global.manager';
+import { getMockObjectMetadataEntity } from 'src/utils/__test__/get-object-metadata-entity.mock';
 
 export interface AgentToolTestContext {
   module: TestingModule;
@@ -130,7 +131,7 @@ export const createAgentToolTestModule =
       isEditable: true,
     } as RoleEntity;
 
-    const testObjectMetadata = {
+    const testObjectMetadata = getMockObjectMetadataEntity({
       id: 'test-object-id',
       standardId: null,
       dataSourceId: 'test-data-source-id',
@@ -158,7 +159,7 @@ export const createAgentToolTestModule =
       dataSource: {} as any,
       objectPermissions: [],
       fieldPermissions: [],
-    };
+    });
 
     return {
       module,