Add PIPELINES metadata table

[ryannedolan]

Summary

• Add k8s.PIPELINES metadata table.

Details

So far, this is just for convenience purposes, and for symmetry with the other metadata tables. With this change, users can check on the status of their pipelines without dropping out of the CLI.

Testing

0: Hoptimator> select * from "k8s".pipelines;
+---------------+-----------+
|     NAME      |  STATUS   |
+---------------+-----------+
| ads-audience2 | Deployed. |
| ads-target2   | Deployed. |
+---------------+-----------+
2 rows selected (0.593 seconds)