chore: Make Celery Queue Depth page less

[tiina303]

companion to https://github.com/PostHog/charts/pull/773

We've been paging for this daily for more than 10 days. In all of those cases there hasn't been any action and it resolves itself. This creates alert fatigue, so let's make the alert less sensitive. We can additionally add a non-paging alert, if this is deemed useful.

Description

Type of change

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

How has this been tested?

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

[tiina303]

Just to confirm ERROR test_redis_internal_with_password.py::test_redis_secret - TypeError: getfixtureclosure() missing 1 required positional argument: 'ignore_args' is a known problem and I can merge this PR?