Support SHA-256 on CloudFront signing#3406
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CloudFront supports SHA-256 as of April 2026 https://aws.amazon.com/about-aws/whats-new/2026/04/amazon-cloudfront-sha-256-signed-urls/
We add support for CloudFront signing via customization, so extending it to support SHA-256 as another algorithm to use by adding
SignWithAlgorithmfunction. ExistingSignuses SHA-1 and not providing an algorithm defaults to SHA-1, so existing users won't be impacted by this.There's no guidance from CloudFront about this being preferred over SHA-1, so not marking any existing functions as deprecated or on path to deprecation, or marking any preference between one or the other.
This was verified on a similar fashion as a previous PR #3325 (comment)
This closes #3373