Additions and strategy changes for LVK O4 run

[martinjohndyer]

The main purpose of this PR was to update the GW strategy and response for the O4 run (#70). After several iterations we decided on the following flow chart for event classification:

As well as this we have a new follow-up cadence for the majority of events, which reschedules pointings 1h after the initial observation at the same rank before falling below the others (see https://github.com/GOTO-OBS/gtecs-obs/pull/92).

Some other changes worth mentioning:

• Add the IGNORED strategy for notices.
• Add RAVEN external coincidence info if included in the notice, and use the combined map if provided (#29).
• Add GWNotice.from_gracedb() to save the often slow IVORN downloads from 4pisky.
• Add specific channels for types of event (GW/GRB/NU) or ignored events, with the detailed messages posted to those channels while general messages stay in the default sentinel channel (and have the details linked using the permalink from https://github.com/GOTO-OBS/gtecs-common/pull/7).
• Added a "WAKEUP" channel with a flag for specific strategies.
• Improve GRB waiting thread to add timeouts and not repeat for the same notice (#50 & https://github.com/GOTO-OBS/gtecs-control/pull/553).

[martinjohndyer]

I think this has been running for long enough to merge now. The wait was mostly to just check the retraction code worked, and it mostly did.