Further automate build and release process

We also have partially automated the release process in GitHub Actions but haven't reached the level of automation that we have for Windows and Azure Pipelines.

Currently run_release requires humans to click around in the GitHub UI to manually execute the GitHub workflow, which wasn't the case before. We also lost the automatic local testing step in favor of testing on GitHub Actions, but local assurance is good to have for RMs.

• Further automate kicking off the build and release workflows on GitHub Actions.
• Automatically detect workflow completion and download artifacts from GitHub Actions.
• Add back local testing to run_release.py script once artifacts are automatically downloaded.

cc @ambv

Inizia con lo script run_release.py e i workflow di GitHub Actions coinvolti nella build e nella release. Traccia come vengono attualmente gestiti il completamento dei workflow e gli artefatti, quindi determina il passaggio di test locale che è stato rimosso. Il lavoro è completato quando i workflow possono essere rilevati e gli artefatti scaricati automaticamente, e i test locali sono stati ripristinati in run_release.py.