[Nova] Clean commit for Enabling Nova Linux Wheels Workflows (#2719)

Summary:
Creating this fresh PR since we're reverting the older commit that removed build configs from the CircleCI file. This does not change the existing builds/uploads in CircleCI, and should not break any existing jobs/workflows. This is just to add back workflows to build the Linux Wheels with Nova, upload them to GH artifacts (NOT to the actual nightly channels), and ensure that they produce the same binaries as CircleCI. TO CLARIFY: this does not upload anything to nightly channels, so this PR has not effect on any existing jobs or distributed binaries.

We will create a workflow (most likely in test-infra) that does this comparison between the binaries to ensure there is parity between the binaries before we start uploading with Nova.

Pull Request resolved: https://github.com/pytorch/audio/pull/2719

Reviewed By: hwangjeff, weiwangmeta

Differential Revision: D39866440

Pulled By: osalpekar

fbshipit-source-id: 9ebf0402214fcd97cc519801276d85d336617410

.github/workflows/build_wheels_linux.yml

+name: Trigger Linux Wheels Build for Nightlies/Release
+
+on:
+  pull_request:
+    paths:
+      - .github/workflows/build_wheels_linux.yml
+  push:
+    branches:
+      - nightly
+  workflow_dispatch:
+
+jobs:
+  generate-matrix:
+    uses: pytorch/test-infra/.github/workflows/generate_binary_build_matrix.yml@main
+    with:
+      package-type: wheel
+      os: linux
+      test-infra-repository: pytorch/test-infra
+      test-infra-ref: main
+  build:
+    needs: generate-matrix
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - repository: pytorch/audio
+            pre-script: packaging/pre_build_script.sh
+            post-script: packaging/post_build_script.sh
+            package-name: torchaudio
+    name: ${{ matrix.repository }}
+    uses: pytorch/test-infra/.github/workflows/build_wheels_linux.yml@main
+    with:
+      repository: ${{ matrix.repository }}
+      ref: nightly
+      test-infra-repository: pytorch/test-infra
+      test-infra-ref: main
+      build-matrix: ${{ needs.generate-matrix.outputs.matrix }}
+      pre-script: ${{ matrix.pre-script }}
+      post-script: ${{ matrix.post-script }}
+      package-name: ${{ matrix.package-name }}
+      # Using "development" as trigger event so these binaries are not uploaded
+      # to official channels yet
+      trigger-event: development
+    secrets:
+      AWS_PYTORCH_UPLOADER_ACCESS_KEY_ID: ${{ secrets.AWS_PYTORCH_UPLOADER_ACCESS_KEY_ID }}
+      AWS_PYTORCH_UPLOADER_SECRET_ACCESS_KEY: ${{ secrets.AWS_PYTORCH_UPLOADER_SECRET_ACCESS_KEY }}