Add/Delete API keys to Service accounts (#44871)

* ServiceAccounts: move token handlers to specific file

* ServiceAccounts: move Add API key to Service account

* APIKeys: api keys can still be used even when service accounts are enabled

* APIKeys: legacy endpoint can't be used to add SA tokens

* ServiceAccount: add tests for creation with nil and non-nil service account ids

* ServiceAccounts: fix unnasigned cfg and AC typo

* Test: test service account token adding

* fix linting error

* ServiceAccounts: Handle Token deletion

* rename token funcs

* rename token funcs and api wrapping

* add token deletion tests

* review

Co-authored-by: eleijonmarck <eric.leijonmarck@gmail.com>

* remove bus

* Update pkg/api/apikey.go

Co-authored-by: eleijonmarck <eric.leijonmarck@gmail.com>

pkg/services/serviceaccounts/api/api_test.go

@@ -17,6 +17,7 @@ import (
 	"github.com/grafana/grafana/pkg/services/serviceaccounts"
 	"github.com/grafana/grafana/pkg/services/serviceaccounts/tests"
 	"github.com/grafana/grafana/pkg/services/sqlstore"
+	"github.com/grafana/grafana/pkg/setting"
 	"github.com/grafana/grafana/pkg/web"
 	"github.com/stretchr/testify/require"
 
@@ -96,9 +97,11 @@ func serviceAccountRequestScenario(t *testing.T, httpMethod string, endpoint str
 }
 
 func setupTestServer(t *testing.T, svc *tests.ServiceAccountMock, routerRegister routing.RouteRegister, acmock *accesscontrolmock.Mock, sqlStore *sqlstore.SQLStore) *web.Mux {
-	a := NewServiceAccountsAPI(svc, acmock, routerRegister, database.NewServiceAccountsStore(sqlStore))
+	a := NewServiceAccountsAPI(setting.NewCfg(), svc, acmock, routerRegister, database.NewServiceAccountsStore(sqlStore), sqlStore)
 	a.RegisterAPIEndpoints(featuremgmt.WithFeatures(featuremgmt.FlagServiceAccounts))
 
+	a.cfg.ApiKeyMaxSecondsToLive = -1 // disable api key expiration
+
 	m := web.New()
 	signedUser := &models.SignedInUser{
 		OrgId:   1,