Instrumentation: Add counters and histograms for database queries (#28236)

Signed-off-by: bergquist <carl.bergquist@gmail.com>

Co-authored-by: Sofia Papagiannaki <papagian@users.noreply.github.com>
Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>
(cherry picked from commit 74d1d3c6a8)

pkg/services/sqlstore/sqlstore.go

@@ -238,6 +238,10 @@ func (ss *SqlStore) getEngine() (*xorm.Engine, error) {
 		return nil, err
 	}
 
+	if ss.Cfg.IsDatabaseMetricsEnabled() {
+		ss.dbCfg.Type = WrapDatabaseDriverWithHooks(ss.dbCfg.Type)
+	}
+
 	sqlog.Info("Connecting to DB", "dbtype", ss.dbCfg.Type)
 	if ss.dbCfg.Type == migrator.SQLITE && strings.HasPrefix(connectionString, "file:") {
 		exists, err := fs.Exists(ss.dbCfg.Path)