Migrate tests away from S3 SDK `MD5DigestCalculatingInputStream`#126214

elasticsearchmachine merged 2 commits intoelastic:8.xelastic/elasticsearch:8.xfrom

DaveCTurner:2025/04/03/backport-126099-MD5DigestCalculatingInputStreamDaveCTurner/elasticsearch:2025/04/03/backport-126099-MD5DigestCalculatingInputStreamCopy head branch name to clipboard