Update pre_build_script.sh

[msaroufim]

When we merged #369 we completely got rid of any requirements.txt we had because we have no dependencies outside of torch. The torch dependency is also pulled defined directly inside a setup.py because it's an environment variable that will decide which version of pytorch we'll install.

This passed CI just fine but then when the script was merged to main and the binary builds were triggered it broke all our binary builds

This is because in our binary build scripts in packaging/ we still run pip install -r requirements.txt and we also need to install pip install -r dev-requirements.txt because later in our post build validation we check we run pytest. Since the requirements.txt no longer exists the script fails.

The reason why we didn't catch this in CI is because we don't run binary validation scripts per commit but we run it when code gets merged to main

In the future before making CI changes it's worth triggering a manual workflow-dispatch to make sure this change is safe to land

Doing a manual dispatch to make sure this passes before merging as I've done here https://github.com/pytorch/ao/actions/workflows/build_wheels_linux.yml

[pytorch-bot]

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• inductor_torchbench_perf jobs are broken due to numpy 2.0 update

✅ You can merge normally! (2 Unrelated Failures)

As of commit 5b3a639 with merge base 1b78dda ():

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• Run Regression Tests / test (CUDA Nightly, linux.g5.12xlarge.nvidia.gpu, --pre torch --index-url https://download.pytorc... / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128

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

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

• Build Linux Wheels / build / upload / manywheel-py3_9-cuda12_1 (gh) (trunk failure)

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[malfet]

Would be good to add a bit more explanation, but sure, if it fixes the builds..

[msaroufim]

All builds jobs passed except 1 which was a flake so this is good to merge