Issue labe improvements

Hi, from time to time when I try to go through upstream issues I always feel that the labels we have are suboptimal and don't always allow to track the current state of the issue. Recently I've had a look at the qemu issues and found what I was lacking. Specifically I'm lacking the 'workflow' class of labels they use. I propose we adopt the following changes: 1) Convert the existing 'bug', 'enhancement', 'support', and 'discussion' labels into a set of scoped labels (again inspiration taken from qemu): kind::bug kind::enhancement kind::support kind::discussion kind::documentation This is mostly as the above kinds are mutually exclusive. 2) Introduce the workflow label similarly to what qemu uses: workflow::Confirmed/Triaged (<- confirmed for bugs, triaged for enhancements) workflow::Needs Info (replaces "needinfo") workflow::In progress (replaces "Doing") I'd also potentially like to have a 'Unconfirmed' state for when the bug has enough info, but it's unknown why it's happening. I want to specifically avoid the ambiguous "Triaged" when used on it's own. 3) Convert host-* labels into a scoped label. Hosts are usually mutually exclusive 4) Convert driver-* into scoped labels. Usually issues are not exceeding these boundaries 5) Remove the following unused or ambiguous labels: - critical - incident - Doing - To Do - gsoc::20* (all seem to be unused) I'm willing to go ahead and re-triage open stuff if nobody objects to the above changes.