Temporarily disable upstream label test

[gerrod3]

Needed for https://github.com/pulp/pulpcore/pull/5733

[patchback[bot]]

Backport to 0.28: 💚 backport PR created

✅ Backport PR branch: patchback/backports/0.28/49e2b071b1efa587c7e405f2b95dd38500a0706e/pr-1054

Backported as https://github.com/pulp/pulp-cli/pull/1055

🤖 @patchback I'm built with octomachinery and my source is open — https://github.com/sanitizers/patchback-github-app.