ci: Update to macOS M1 runners
GitLab has recently deprecated the Intel-based macOS runners. As we are still using them as part of our pipeline the consequence is that the pipelines are now broken.
Fix this by updating to the new M1 runners.
GitLab has recently deprecated the Intel-based macOS runners. As we are still using them as part of our pipeline the consequence is that the pipelines are now broken.
Fix this by updating to the new M1 runners.