Fix TOSA lowering without output quantization

[benkli01]

In process_call_function() we need to check for output quantization explicitly when adding a tensor for the output of the current node.

[pytorch-bot]

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❌ 3 New Failures, 1 Unrelated Failure

As of commit 4cfcae5 with merge base cb12061 ():

NEW FAILURES - The following jobs have failed:

• pull / unittest-arm (buck2) / linux-job (gh)
  ../../dev/ops/test_add.py::TestSimpleAdd::test_add2_u55_BI_1
• trunk / test-arm-backend-delegation / linux-job (gh)
  RuntimeError: Command docker exec -t 2c65273e4f134d26a6772adad6baeccf7feb46dceeda7f06358f99400e82af36 /exec failed with exit code 1
• trunk / test-arm-reference-delegation / linux-job (gh)
  ../../dev/ops/test_add.py::TestSimpleAdd::test_add2_u55_BI_1

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

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

• trunk / test-models-macos (cmake, llama2, xnnpack-delegation, macos-m1-stable, 90) / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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[digantdesai]

CI is red, assuming this is a WIP?

[benkli01]

CI is red, assuming this is a WIP?

Yes, sorry. I meant to mark this as draft.

[benkli01]

Closing as this is covered by #6690.