Dashboard/Folder permission fix session (#47174)

* Fix inherited scopes for dashboard to use folder uid

* Add inherited evaluators

* Slight modification of the commments

* Add test for inheritance

* Nit.

* extract shared function from tests

* Nit. Extra line

* Remove unused comment

Co-authored-by: Karl Persson <kalle.persson@grafana.com>
Co-authored-by: gamab <gabi.mabs@gmail.com>

pkg/services/accesscontrol/scope.go

@@ -143,7 +143,7 @@ func (s *ScopeResolver) GetResolveAttributeScopeMutator(orgID int64) ScopeMutato
 		var err error
 		// By default the scope remains unchanged
 		resolvedScope := scope
-		prefix := scopePrefix(scope)
+		prefix := ScopePrefix(scope)
 		if fn, ok := s.attributeResolvers[prefix]; ok {
 			resolvedScope, err = fn(ctx, orgID, scope)
 			if err != nil {
@@ -157,10 +157,10 @@ func (s *ScopeResolver) GetResolveAttributeScopeMutator(orgID int64) ScopeMutato
 	}
 }
 
-// scopePrefix returns the prefix associated to a given scope
+// ScopePrefix returns the prefix associated to a given scope
 // we assume prefixes are all in the form <resource>:<attribute>:<value>
 // ex: "datasources:name:test" returns "datasources:name:"
-func scopePrefix(scope string) string {
+func ScopePrefix(scope string) string {
 	parts := strings.Split(scope, ":")
 	// We assume prefixes don't have more than maxPrefixParts parts
 	if len(parts) > maxPrefixParts {