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/tests/api/correlations/common_test.go

@@ -18,6 +18,7 @@ import (
 	"github.com/grafana/grafana/pkg/services/user"
 	"github.com/grafana/grafana/pkg/services/user/userimpl"
 	"github.com/grafana/grafana/pkg/tests/testinfra"
+	"github.com/grafana/grafana/pkg/tests/testsuite"
 )
 
 type errorResponseBody struct {
@@ -30,6 +31,10 @@ type TestContext struct {
 	t   *testing.T
 }
 
+func TestMain(m *testing.M) {
+	testsuite.Run(m)
+}
+
 func NewTestEnv(t *testing.T) TestContext {
 	t.Helper()
 	dir, path := testinfra.CreateGrafDir(t, testinfra.GrafanaOpts{