Chore: Refactor quota service (#58643)

Chore: Refactor quota service (#57586)

* Chore: refactore quota service

* Apply suggestions from code review

pkg/services/org/orgimpl/org_test.go

@@ -5,6 +5,7 @@ import (
 	"testing"
 
 	"github.com/grafana/grafana/pkg/services/org"
+	"github.com/grafana/grafana/pkg/services/quota"
 	"github.com/grafana/grafana/pkg/setting"
 	"github.com/stretchr/testify/require"
 )
@@ -135,3 +136,7 @@ func (f *FakeOrgStore) SearchOrgUsers(ctx context.Context, query *org.SearchOrgU
 func (f *FakeOrgStore) RemoveOrgUser(ctx context.Context, cmd *org.RemoveOrgUserCommand) error {
 	return f.ExpectedError
 }
+
+func (f *FakeOrgStore) Count(ctx context.Context, _ *quota.ScopeParameters) (*quota.Map, error) {
+	return nil, nil
+}