Chore: Make Cfg field private in SQLStore (#85593)

* make cfg private in sqlstore

* fix db init in tests

* fix case

* fix folder test init

* fix imports

* make another Cfg private

* remove another Cfg

* remove unused variable

* use store cfg, it has side-effects

* fix mutated cfg in tests

pkg/api/folder_bench_test.go

@@ -201,13 +201,12 @@ func BenchmarkFolderListAndSearch(b *testing.B) {
 
 func setupDB(b testing.TB) benchScenario {
 	b.Helper()
-	db := sqlstore.InitTestDB(b)
+	db, cfg := sqlstore.InitTestDB(b)
 	IDs := map[int64]struct{}{}
 
 	opts := sqlstore.NativeSettingsForDialect(db.GetDialect())
 
 	quotaService := quotatest.New(false, nil)
-	cfg := setting.NewCfg()
 
 	teamSvc, err := teamimpl.ProvideService(db, cfg)
 	require.NoError(b, err)