refactor(core): Extract all Auth-related User columns into a separate entity (#9557)

Co-authored-by: Ricardo Espinoza <ricardo@n8n.io>

packages/cli/test/unit/databases/entities/user.entity.test.ts

@@ -9,8 +9,6 @@ describe('User Entity', () => {
 				lastName: 'Joe',
 				password: '123456789',
 				apiKey: '123',
-				mfaSecret: '123',
-				mfaRecoveryCodes: ['123'],
 			});
 			expect(JSON.stringify(user)).toEqual(
 				'{"email":"test@example.com","firstName":"Don","lastName":"Joe"}',