Manually trigger the SCCB CI job

The new review workflow requires us to run releases on playground for 5 days before opening the SCCB ticket. This MR removes the automation of the SCCB job, making it a manual job.

Note that the SCCB job has certain requirements in order to open an issue, so it's possible to manually trigger this job without creating an SCCB issue. The job will still need to be run on appropriately named tags in order to actually open the ticket.

EDIT: Adjusted CI to only allow this job to be run for tags on the emfollow fork, so the option should only show up for tags.