Fix: avoid panics on duplicate metrics registration (#74359)

pkg/services/sqlstore/sqlstore.go

@@ -80,9 +80,13 @@ func ProvideService(cfg *setting.Cfg, cacheService *localcache.CacheService, mig
 	db := s.engine.DB().DB
 
 	// register the go_sql_stats_connections_* metrics
-	prometheus.MustRegister(sqlstats.NewStatsCollector("grafana", db))
+	if err := prometheus.Register(sqlstats.NewStatsCollector("grafana", db)); err != nil {
+		s.log.Warn("Failed to register sqlstore stats collector", "error", err)
+	}
 	// TODO: deprecate/remove these metrics
-	prometheus.MustRegister(newSQLStoreMetrics(db))
+	if err := prometheus.Register(newSQLStoreMetrics(db)); err != nil {
+		s.log.Warn("Failed to register sqlstore metrics", "error", err)
+	}
 
 	return s, nil
 }