Fix global nav tests for upstream pipelines
In the two related issues, we tried to improve the review apps in upstream branches, but I got the rules wrong in both
- Related to !3343 (merged)
- Related to !3327 (merged)
We didn't need to remove the rules from the config, we needed to add when: manual
to block the job, due to a later rule that runs the job on default branch pipelines (and upstream review apps trigger pipelines on the default branch).
We also needed to add when: manual
to the correct rules...