Affected Object Labels as Tags

[dneuhaeuser-zalando]

We make use of labels to identify resources belonging to applications and/or teams. It would be really useful to have those as tags in sentry to filter by them.

So I would propose adding labels as tags (possibly filtered by a whitelist). I'd be happy to make a PR implementing this but I'd like to get some feedback on the idea before I make a PR that gets rejected.

[bretthoerner]

The idea makes sense to me, PRs welcome.