Add C++ unit tests for cadence::quantized_conv1d_ncl.out and quantized_conv1d_nlc.out (#19161)

[hsharma35]

Summary:

Adds C++ unit tests for cadence::quantized_conv1d_ncl.out and cadence::quantized_conv1d_nlc.out in test_op_quantized_conv1d_ncl.cpp. Also modifies op_quantized_conv1d_ncl.cpp and op_quantized_conv1d_nlc.cpp in the HiFi backend to fix correctness issues surfaced by the new tests.

Reviewed By: mcremon-meta, zonglinpeng

Differential Revision: D97886683

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/19161

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❌ 1 New Failure, 3 Cancelled Jobs, 2 Pending, 2 Unrelated Failures

As of commit 612d296 with merge base 9207001 ():

NEW FAILURE - The following job has failed:

• pull / unittest / macos / macos-job (gh)
  export/tests/test_target_recipes.py::TestTargetRecipes::test_mv2_model

CANCELLED JOBS - The following jobs were cancelled. Please retry:

• pull / test-lora-linux / linux-job (gh)
  ##[error]The operation was canceled.
• pull / test-lora-multimethod-linux / linux-job (gh)
  ##[error]The operation was canceled.
• pull / test-phi-3-mini-runner-linux / linux-job (gh)
  ##[error]The operation was canceled.

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / test-models-linux (phi_4_mini, portable, linux.4xlarge.memory) / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• pull / test-voxtral-realtime-xnnpack-linux / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.

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[meta-codesync]

@hsharma35 has exported this pull request. If you are a Meta employee, you can view the originating Diff in D97886683.