Adds staff+ label to all issues assigned to staff+ ICs
Rules for this policy (uses a fair amount of inscrutible yaml merging, sorry!):
- Adds the label "staff+" to all assigned issues to staff+ ICs using group membership
- Removes the label "staff+" if an issue is re-assigned to someone who is not in the staff+ group
These rules are added for the SaaS Platforms Leads Demo EMEA/AMER doc The idea is that with a label on issues that are assigned to individuals who are staff+ we can create an issue board to see what all the staff+ engineers are working on. Note that this policy is in the platform/ folder because we want these rules to run on multiple team projects because it is possible to have issues assigned to staff+ ICs outside their team tracker.