Re-enable backward_adagrad_test on Nova (pytorch#3107)

Summary:
as titled

Pull Request resolved: pytorch#3107

Reviewed By: q10

Differential Revision: D62449088

fbshipit-source-id: e8988da7476c7682b0100685226298ac44f1f7e3

.github/scripts/fbgemm_gpu_test.bash

@@ -102,13 +102,6 @@ __configure_fbgemm_gpu_test_cuda () {
   ignored_tests=(
   )
 
-  # Temporay skip test to unblock 12.1 release on Nova while debugging the fix
-  # skip backward_adagrad_test because it takes the longest, ~ 3 mins, which is enough
-  if [ "$BUILD_FROM_NOVA" == 1 ] && [ "$CU_VERSION" == "cu121" ]; then
-    ignored_tests=(
-      ./tbe/training/backward_adagrad_test.py
-  )
-  fi
 }
 
 __configure_fbgemm_gpu_test_rocm () {