Add support for Arm tests on MacOS

[per]

Check which platform is used for the extension of the quantization lib and select extensions for dynamic libraries accordingly.

Change-Id: I7e4afcccf7f7d8de7416a83e9bfe4511a6540912

[pytorch-bot]

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❌ 1 New Failure, 1 Unrelated Failure

As of commit 2925387 with merge base 04669a1 ():

NEW FAILURE - The following job has failed:

• trunk / test-models-macos (cmake, add, xnnpack-quantization-delegation, macos-m1-stable, 90) / macos-job (gh)
  Library not loaded: @rpath/liblz4.1.dylib

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-coreml-delegate / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 1

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[zingo]

@pytorchbot label ciflow/trunk

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@digantdesai merged this pull request in 8ac2608.