guix: add --no-same-owner to codesign.sh TAR_OPTIONS #36615

Just ran guix-codesign for v32.0 as root, in fanquake's container image (option 3 in INSTALL.md) and got this error while unpacking the codesigning tarball:

tar: ./detached-sig-create.sh: Cannot change ownership to uid 0, gid 0: Invalid argument
tar: ./unsigned/bitcoin-32.0: Cannot change ownership to uid 0, gid 0: Invalid argument
tar: ./unsigned/bitcoin-32.0-win64-setup-unsigned.exe: Cannot change ownership to uid 0, gid 0: Invalid argument
...
tar: Exiting with failure status due to previous errors

Same happens for the macOS files.

When updating guix in #34550, --no-same-owner was added in build.sh (now in setup.sh) in 0f323e10759aba4429677d0e1e202bf575b6d664, but not in codesign.sh. This PR adds it to TAR_OPTIONS in codesign.sh. This fixed the issue for me and my hashes match the other attestations for v32.0.

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External sites

• Code coverage & benchmarks: https://corecheck.dev/bitcoin/bitcoin/pulls/36615
• Ralph review <img src=https://review.fish.foo/assets/bitcoin/bitcoin/36615.png alt="Ralph review status"> https://git.fish.foo/bitcoin/bitcoin/pulls/36615#author-ralph

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Bit out of my depth here, so if there's a reason to not add this option for codesigning or I just shouldn't be doing this as root or something, let me know.