cosign downloads from GCS bucket will not work after today

[bobcallaway]

please see https://blog.sigstore.dev/cosign-releases-bucket-deprecation/

platform/lib/install.sh

Line 153 in 01c9e33

curl -sSL -o "${install_dir}/cosign" https://storage.googleapis.com/cosign-releases/${cosign_version}/cosign-linux-amd64