Rework LAVA test submission
- 39e5840e gitlab-ci: Make customizing the .submit-tests rules easier
- 358817a3 gitlab-ci: Make customizing the .submit-tests stage easier
- 33e0017d gitlab-ci: Tag .submit-tests as lightweight in a single place
- 9a92f15d lava: Link LAVA jobs to the submitting GitLab pipeline
- fcf9be93 lava: Set source_wip metadata to avoid Phab noise from wip branches
- 8376857d gitlab-ci: Make debugging easier on LAVA job submission
- 235b1926 gitlab-ci: Clean up some variable names in .submit-tests
- e591067d gitlab-ci: Improve variable quoting in .submit-tests