Add record table widget feature flag (#18960)

Introduce a new feature flag for the record table widget, enabling
conditional rendering and state management based on its status. Update
related components and tests accordingly.

---------

Co-authored-by: Charles Bochet <charlesBochet@users.noreply.github.com>

packages/twenty-server/src/engine/workspace-manager/dev-seeder/core/utils/seed-feature-flags.util.ts

@@ -115,6 +115,11 @@ export const seedFeatureFlags = async ({
         workspaceId: workspaceId,
         value: true,
       },
+      {
+        key: FeatureFlagKey.IS_RECORD_TABLE_WIDGET_ENABLED,
+        workspaceId: workspaceId,
+        value: true,
+      },
     ])
     .execute();
 };