Unfurl links into a chart

[obostjancic]

We'll have to investigate how to get this into chartcuterie.

[ArthurKnaus]

This requires a bit more work that we don't want to prioritize atm as some dependencies (e.g. metrics page query params) are not stable yet.

Required work:

• Add new slack URL handler on the BE (see https://github.com/getsentry/sentry/blob/master/src/sentry/integrations/slack/unfurl/discover.py)
• Register a new chartcutery config in https://github.com/getsentry/sentry/blob/master/static/app/chartcuterie/config.tsx
  • This needs a bit of cleanup in the current metrics code base as the processing of time series is split over multiple components / functions atm.

[HazAT]

We decided to move this back since the effort is higher than expected, but we keep this in the back pocket of still todo