[web] Add admin permission `modify-project` (#27491)

* Add capability `modify-project`

* Check `modify-project` (frontend)

* Check `modify-project` (backend)

* Update tests

* Allow admin to open project regardless of `modify-project`

* Hide `CurrentHistoryDebug` for admins without `modify-project`

GitOrigin-RevId: 92b9b59a2cafff26ea943209b60cda4e95bd58b0

services/web/types/admin-capabilities.ts

@@ -7,6 +7,7 @@ export type AdminCapability =
   | 'modify-group'
   | 'modify-login-status'
   | 'modify-managed-group'
+  | 'modify-project'
   | 'manage-survey'
   | 'modify-split-test'
   | 'modify-user-email'