Add and backfill project_id for p_ci_runner_machine_builds
requested to merge pedropombeiro/459999/2-add-and-backfill-project_id into pedropombeiro/459999/add-desired_sharding_key
What does this MR do and why?
This MR adds and backfills project_id for p_ci_pipeline_variables as this is a requirement for Cells1.0.
We have about ~500M records to update which should take TODO to complete on gitlab.com.
Edited by Pedro Pombeiro