Reflect current reality of how Support work is prioritized

Why is this change being made?

This is to adress Prioritizing work and unassigned NRT (gitlab-com/support/support-team-meta#4888 - closed), but it includes two changes that aren't directly related to it:

1. Removing the needs-org part, as it has been deprecated
2. Prioritize indirect ticket work a bit higher. Personally, I'd even consider moving it above Help on tickets assigned to others in your group by, because if I truly always only followed that list, I would simply never make another Docs MR ever.

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