Do not run all single-db jobs in predictive pipelines

Context

We noticed there's a predictive pipeline running too many jobs: https://gitlab.com/gitlab-org/gitlab/-/pipelines/1229030009/

It's running a lot of single-db jobs on db-patterns and decomposed-db-models-patterns.

This pipeline was discovered via https://app.snowflake.com/ys68254/gitlab/w4f5W5vbmcRw

Goal

Only run them all after approval.