Retrieve GitHub release asset digests from GitHub API

[risu729]

Tell us more.

GitHub now exposes release asset digests directly via its API (changelog).

To improve efficiency in the github-release-attachments datasource, we should fetch these API-provided digests when available.
The current methods of parsing checksum files (e.g., SHASUMS.txt) or downloading assets to calculate their digests should be retained as a fallback for older releases.

I would like to create a pull request for this.

[jamietanna]

Closed by #37151 - thanks for contributing!