message: Set shard_count for prng_stability_models_test to 4
  Summary:
  REF T50891
  TF2.4 Only
  v1 diff: D56355
  Reviewers: georgep, babakk, #tensorflow, #framework_ip_review_-_any_oss_or_third-party_code_use_has_been_approved
  Maniphest Tasks: T50891
diff: @@ -1958,6 +1958,7 @@ tf_py_test(
  srcs = [
  "tests/prng_stability_models_test.py",
  ],
  + shard_count = 4,
  tags = ["hw_poplar_test"],
  deps = [
  "//tensorflow/compiler/plugin/poplar:test_utils_py",
  