Database; Remove database metric feature flag and update changelog (#28438)

* adds note about broken feature flag

* remove code to enable feature flag

Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>

pkg/services/sqlstore/sqlstore.go

@@ -238,10 +238,6 @@ 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)