feat: add separate celery queue for usage reports

[raquelmsmith]

Problem

Usage reports cause a big spike in celery tasks, which then trigger an alert for the redis queue depth. We can move these to a separate queue with no alert so that they don't trigger it.

Changes

• Create a usage_report queue
• Add metrics for this queue so we can see when they are running (if there are issues with them running the first thing I look at is celery)

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How did you test this code?

[github-actions]

Size Change: 0 B

Total Size: 2.22 MB

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Filename	Size
frontend/dist/toolbar.js	2.22 MB

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[webjunkie]

Looks good!

[benjackwhite]

@raquelmsmith just FYI - modified this to have each task use the queue. It doesn't work to only have the parent task on its own. The task that get created also need to specify their intended queue

[raquelmsmith]

Oh that makes sense. Thanks!