ci: Disable 8.0 upgrade suite to unbreak CI.

As noted in the comment, hopefully we get to revert this tomorrow, but
it still seems worth doing so that PRs can pass CI again.

.github/workflows/production-suite.yml

@@ -262,9 +262,10 @@ jobs:
           - docker_image: zulip/ci:bookworm-7.0
             name: 7.0 Version Upgrade
             os: bookworm
-          - docker_image: zulip/ci:bookworm-8.0
-            name: 8.0 Version Upgrade
-            os: bookworm
+          # Temporarily disabled so CI passes pending https://github.com/apache/arrow/issues/40744.
+          # - docker_image: zulip/ci:bookworm-8.0
+          #   name: 8.0 Version Upgrade
+          #   os: bookworm
 
     name: ${{ matrix.name  }}
     container: