Migrate to linux_job_v2 (#375)

Author: NicolasHug

.github/workflows/build_ffmpeg.yaml

@@ -28,7 +28,7 @@ jobs:
       fail-fast: false
       matrix:
         ffmpeg-version: ["4.4.4", "5.1.4", "6.1.1", "7.0.1"]
-    uses: pytorch/test-infra/.github/workflows/linux_job.yml@main
+    uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main
     with:
       job-name: Build
       upload-artifact: ffmpeg-lgpl