MesaCI add rules for manual test of experimental devices on Merge Requests
The process of stabilizing a new device in the CI infra is long, so we don't to enable the right away in Mesa to avoid disruptions on the pre-merge testing. However, as the devices become more stable a good option is to have them as a manual jobs in the pipeline.
This MR only enable it for the Intel devices, I feel it is up to each device owner to do this change for their devices.