CI: Generate/Verify Attestation for Windows builds

[derrod]

Description

Adds GitHub's new attestation feature to Windows release workflows.

Motivation and Context

This ensures that the artifact used to generate delta updates has been generated on CI and has not been altered before the patch workflow runs.

How Has This Been Tested?

Tested on my fork.

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[derrod]

I've now tested this and verified it works as intended. Just needed the update to the commit hash as well.

[RytoEX]

This looks okay at a glance. @PatTheMav ?

@derrod I guess this requires a merge commit to avoid breaking the specified action hash?

[derrod]

@derrod I guess this requires a merge commit to avoid breaking the specified action hash?

Yes.