[WIP] Scaling down k8s worker pool interrupts associated jobs

[BrendanSchell]

Description

• Updates scaling down in k8s to interrupt jobs on the workers and then delete the workers. Added some testing to notebooks/scenarios/bigquery/001-scale-delete-worker-pools.ipynb.
• Also didn't seem like job_id was being set on the worker when a job was assigned to it so that was updated which should allow worker.delete to trigger job.kill on the job.
• Increased scale pool timeout for tests (scaling down to 0 seems to take a little longer now)

Still failing some tests so debugging that.

Closes https://github.com/OpenMined/Heartbeat/issues/1818.

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[BrendanSchell]

Deprioritized - closing with latest state of code so that it can be picked up at a later time. Job Status not currently being set to interrupted properly on worker_pool.delete in notebook 2 but seems to be with worker_pool.scale(0). Later notebook also times out trying to test out the mock query because the producer dies.