refactor sentry settings

[maksim-paskal]

reorganize settings for sentry:

sentry:
  # sentry endpoint
  endpoint: https://sentry.domain.com
  # (optional) use relay address instead sentry endpoint
  relay: http://sentry-relay.sentry-relay.svc.cluster.local
  # token for sentry API
  token: <token>
  # name of sentry org
  organization: org
  # (optional) use additional setry project prefixes 
  prefixes:
  - pattern: ^regexp$
    name: some-prefix-
  # mapping sentry project with docker image path
  projects:
    some-service: path/to/docker/image
  # (optional) to make it more reliable - use sentry projects from config instead doing request to sentry API
  cache:
    sentry-project: http://123@sentry-relay.sentry-relay.svc.cluster.local/123