On CI, do not fetch tags in packaging scripts. For some reason, the
checkout action seems to locally update any new git tags on the runner:
t [tag update] (commit-hash) -> tag-name
This causes future calls to fetch git tags to fail on CI with:
! [rejected] tag-name -> tag-name (would clobber existing tag)
To avoid this, we can simply not fetch tags a second time on CI.
Additionally, fix the Windows Installer job.
Hardcode short hash length to 9 characters in CI and packaging scripts.
It is not guaranteed that short hashes are the same length across
different platforms or different versions of git. This caused problems
with upload/download action names, as the hashes sometimes didn't match.
Fix the download artifact name in the Windows installer job and the
macOS notarization job to prevent them from failing due to a name
mismatch.
