Fix backward_dense health-check regression under the ci profile

Summary:
test_backward_dense started failing in OSS CI on 2026-06-15, green before
that. The break is D108096684, which removed the per-test
`suppress_health_check=[HealthCheck.filter_too_much, HealthCheck.data_too_large]`
from `backward_dense_test.py` and moved the suppressions into the
"derandomize" Hypothesis profile registered in `tbe/common.py`.

The problem: OSS CI runs under the "ci" Hypothesis profile, not
"derandomize". The job log shows:

    hypothesis profile 'ci' -> ... suppress_health_check=(HealthCheck.too_slow,)

so the profile-level suppressions never take effect in OSS. test_backward_dense
makes heavy use of assume() (T*B*L*D<=2048, FP16/pooling guards, etc.), which
trips HealthCheck.filter_too_much once the suppression is gone, failing the
test.

Fix: apply the suppressions explicitly in the test's settings via the
centralized `suppressed_list` from `tbe/common.py`. This keeps a single source
of truth (the list still lives in common.py, including the conditional
differing_executors entry) while making the suppression independent of which
profile is loaded.

Differential Revision: D109164907

Author: gchalump

fbgemm_gpu/test/tbe/training/backward_dense_test.py

@@ -32,6 +32,7 @@
     format_ref_tensors_in_mixed_B_layout,
     gen_mixed_B_batch_sizes,
     open_source,
+    suppressed_list,
 )
 
 if open_source:
@@ -78,6 +79,13 @@ class BackwardDenseTest(unittest.TestCase):
         verbosity=VERBOSITY,
         max_examples=10,
         deadline=None,
+        # Apply the health-check suppressions explicitly rather than relying on
+        # the "derandomize" profile: OSS CI runs under the "ci" Hypothesis
+        # profile (which only suppresses too_slow), so the profile-level
+        # suppressions registered in tbe/common.py do not take effect there.
+        # This test's heavy use of assume() trips filter_too_much/data_too_large
+        # without these. See D108096684 which moved these into the profile.
+        suppress_health_check=suppressed_list,
     )
     def test_backward_dense(  # noqa C901
         self,