add the missing flash attention test marker (#32419)

* add flash attention check

* fix

* fix

* add the missing marker

* bug fix

* add one more

* remove order

* add one more

tests/models/qwen2/test_modeling_qwen2.py

@@ -544,6 +544,7 @@ class Qwen2IntegrationTest(unittest.TestCase):
     @require_bitsandbytes
     @slow
     @require_flash_attn
+    @pytest.mark.flash_attn_test
     def test_model_450m_long_prompt(self):
         EXPECTED_OUTPUT_TOKEN_IDS = [306, 338]
         # An input with 4097 tokens that is above the size of the sliding window