Remove flag relation select (#3588)

* Remove feature flag on relation and select

* Move packages back to twenty-server to enable smaller build without using nx

* Fix package.json

packages/twenty-server/src/core/feature-flag/feature-flag.entity.ts

@@ -14,9 +14,7 @@ import { IDField } from '@ptc-org/nestjs-query-graphql';
 import { Workspace } from 'src/core/workspace/workspace.entity';
 
 export enum FeatureFlagKeys {
-  IsRelationFieldTypeEnabled = 'IS_RELATION_FIELD_TYPE_ENABLED',
   IsMessagingEnabled = 'IS_MESSAGING_ENABLED',
-  IsSelectFieldTypeEnabled = 'IS_SELECT_FIELD_TYPE_ENABLED',
   IsRatingFieldTypeEnabled = 'IS_RATING_FIELD_TYPE_ENABLED',
   IsWorkspaceCleanable = 'IS_WORKSPACE_CLEANABLE',
 }