* serviceaccounts/secretscan: test Service more thoroughly
* middleware/cookies: add tests for CookieOptions
* anonymous/anonimpl: cover a couple more methods
* components/imguploader: Implement WebDAV integration tests
* components/apikeygen: also check IsValid method
* bus: cover invalid callback signature cases
* cloudmigration/objectstorage: add basic unit tests
* login/social/connectors: add test case for GitHub OAuth fetch emails+orgs
* expr/classic: cover more evaluator types in tests
This is a translation of services/alerting/conditions. Main Changes:
- Work with types in SSE (series/number) which are data frames (no more null.Float).
- The query part from alerting/conditions is handled by SSE logic
- Convey / simplejson removed.
- Time range no longer part of "query" in the condition
