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/sqlstore/searchstore/search_test.go

@@ -18,6 +18,7 @@ import (
 	"github.com/grafana/grafana/pkg/services/sqlstore/permissions"
 	"github.com/grafana/grafana/pkg/services/sqlstore/searchstore"
 	"github.com/grafana/grafana/pkg/services/user"
+	"github.com/grafana/grafana/pkg/tests/testsuite"
 	"github.com/grafana/grafana/pkg/util"
 )
 
@@ -26,6 +27,10 @@ const (
 	page  int64 = 1
 )
 
+func TestMain(m *testing.M) {
+	testsuite.Run(m)
+}
+
 func TestBuilder_EqualResults_Basic(t *testing.T) {
 	user := &user.SignedInUser{
 		UserID:  1,