This patch adds metrics to support instrumenting the accesscontrols package.
It also instruments the accesscontrol evaluator and the permissions function.
Co-authored-by: Vardan Torosyan <vardants@gmail.com>
Following discussion in grafana/grafana-enterprise#1292, removing
org-scoped users scopes to make it clear that the local organization is
the default and the alternative to that is a global scope (for a select
few endpoints)
* Move db package WIP
* Implement OSS access control
* Register OSS access control
* Fix linter error in tests
* Fix linter error in evaluator
* Simplify OSS tests
* Optimize builtin roles
* Chore: add comments to the exported functions
* Remove init from ossaccesscontrol package (moved to ext)
* Add access control as a dependency for http server
* Modify middleware to receive fallback function
* Middleware: refactor fallback function call
* Move unused models to enterprise
* Simplify AccessControl type
* Chore: use bool IsDisabled() method instead of CanBeDisabled interface
