Fix vault item display in org vault view

In the org vault view, the Bitwarden web vault currently tries to fetch the
groups for an org regardless of whether it claims to have group support.
If this errors out, no vault items are displayed.

src/api/core/organizations.rs

@@ -2056,11 +2056,13 @@ async fn _restore_organization_user(
 
 #[get("/organizations/<org_id>/groups")]
 async fn get_groups(org_id: String, _headers: ManagerHeadersLoose, mut conn: DbConn) -> JsonResult {
-    if !CONFIG.org_groups_enabled() {
-        err!("Group support is disabled");
-    }
-
-    let groups = Group::find_by_organization(&org_id, &mut conn).await.iter().map(Group::to_json).collect::<Value>();
+    let groups = if CONFIG.org_groups_enabled() {
+        Group::find_by_organization(&org_id, &mut conn).await.iter().map(Group::to_json).collect::<Value>()
+    } else {
+        // The Bitwarden clients seem to call this API regardless of whether groups are enabled,
+        // so just act as if there are no groups.
+        Value::Array(Vec::new())
+    };
 
     Ok(Json(json!({
         "Data": groups,