trunk/ce9267a4585256d1465a00a6a7687ce76f3784a5: Fetch tags in unified manywheel build job so release tags are detected

«Release candidate builds triggered by a tag (e.g. v2.13.0-rc1) were producing wheels that pinned triton to a dev-style version such as triton==3.7.1+git5d6048aa instead of the release triton==3.7.1, which then fails to i...»