Chore: Update test database initialization (#81673)

* streamline initialization of test databases, support on-disk sqlite test db

* clean up test databases

* introduce testsuite helper

* use testsuite everywhere we use a test db

* update documentation

* improve error handling

* disable entity integration test until we can figure out locking error

pkg/services/preference/prefimpl/store_test.go

@@ -11,8 +11,13 @@ import (
 	"github.com/grafana/grafana/pkg/infra/db"
 	pref "github.com/grafana/grafana/pkg/services/preference"
 	"github.com/grafana/grafana/pkg/services/user"
+	"github.com/grafana/grafana/pkg/tests/testsuite"
 )
 
+func TestMain(m *testing.M) {
+	testsuite.Run(m)
+}
+
 type getStore func(db.DB) store
 
 func testIntegrationPreferencesDataAccess(t *testing.T, fn getStore) {