[llvm] workflows/release-binaries: Use upload-release-artifact action for uploading (PR #170528)

[Tom Stellard via llvm-commits]

tstellar wrote:

@boomanaiden154 It's mostly tested here: https://github.com/llvm/llvm-project/actions/runs/19989197850 it generates the attestation, uploads the artifacts to the workflow summary, but it doesn't do the last step of uploading to the release page.  I don't think there is any way to test this part.

https://github.com/llvm/llvm-project/pull/170528