[permissions] Enable permissions V1 for all workspaces (#11172)

Closes https://github.com/twentyhq/core-team-issues/issues/526

(for reminder: 
1. Make defaultRoleId non-nullable for an active workspace
2. Remove permissions V1 feature flag
3. Set member role as default role for new workspaces

About 1.:
An active workspace's defaultRoleId should never be null.
We can't rely on a simple postgres NOT NULL constraint as defaultRoleId
will always be initially null when the workspace is first created since
the roles do not exist at that time.

Let's add a more complex rule to ensure that

About 3.:
In the first phase of our deploy of permissions, we chose to assign
admin role to all existing users, not to break any existing behavior
with the introduction of the feature (= existing users have less rights
than before).

As we deploy permissions to all existing and future workspaces, let's
set the member role as default role for future workspaces.
)

packages/twenty-front/src/modules/app/components/SettingsRoutes.tsx

@@ -4,7 +4,6 @@ import { Route, Routes } from 'react-router-dom';
 import { SettingsProtectedRouteWrapper } from '@/settings/components/SettingsProtectedRouteWrapper';
 import { SettingsSkeletonLoader } from '@/settings/components/SettingsSkeletonLoader';
 import { SettingsPath } from '@/types/SettingsPath';
-import { FeatureFlagKey } from '~/generated-metadata/graphql';
 import { SettingPermissionType } from '~/generated/graphql';
 
 const SettingsApiKeys = lazy(() =>
@@ -388,7 +387,6 @@ export const SettingsRoutes = ({
         element={
           <SettingsProtectedRouteWrapper
             settingsPermission={SettingPermissionType.ROLES}
-            requiredFeatureFlag={FeatureFlagKey.IsPermissionsEnabled}
           />
         }
       >