[Bug]: Background job failure emails are failing to send

[tw4l]

Browsertrix Version

v1.20.1 (and likely for the last few minor versions)

What did you expect to happen? What happened instead?

When a background job fails, the superadmin account should receive an email.

Instead, we're seeing the following error:

Succeeded: {status.get('succeeded')}, Num Pods: {spec.get('parallelism')}
Background job create-replica-05ebe9d4cc failed, sending email to superuser
Update Background Job Error
Traceback (most recent call last):
  File "/app/btrixcloud/operator/bgjobs.py", line 70, in finalize_background_job
    await self.background_job_ops.job_finished(
  File "/app/btrixcloud/background_jobs.py", line 525, in job_finished
    await self._send_bg_job_failure_email(job, finished)
  File "/app/btrixcloud/background_jobs.py", line 541, in _send_bg_job_failure_email
    await asyncio.get_event_loop().run_in_executor(
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "uvloop/loop.pyx", line 2735, in uvloop.loop.Loop.run_in_executor
TypeError: coroutines cannot be used with run_in_executor()

Reproduction instructions

1. Set up local instance with a replica storage location that will fail
2. Run a crawl
3. Check logs to see error and verify email was not sent

Screenshots / Video

No response

Environment

No response

Additional details

No response