table_manager: Change some level.Info() logging to level.Debug()

There is excessive logging of "creating table" and "synching tables" messages, change them
to use level.Debug() instead of level.Info() to limit the output.

Fixes grafana#1786

pkg/storage/stores/series/index/table_manager.go

@@ -325,7 +325,7 @@ func (m *TableManager) SyncTables(ctx context.Context) error {
 	}
 
 	expected := m.calculateExpectedTables()
-	level.Info(util_log.Logger).Log("msg", "synching tables", "expected_tables", len(expected))
+	level.Debug(util_log.Logger).Log("msg", "synching tables", "expected_tables", len(expected))
 
 	toCreate, toCheckThroughput, toDelete, err := m.partitionTables(ctx, expected)
 	if err != nil {
@@ -476,7 +476,7 @@ func (m *TableManager) createTables(ctx context.Context, descriptions []config.T
 	merr := tsdb_errors.NewMulti()
 
 	for _, desc := range descriptions {
-		level.Info(util_log.Logger).Log("msg", "creating table", "table", desc.Name)
+		level.Debug(util_log.Logger).Log("msg", "creating table", "table", desc.Name)
 		err := m.client.CreateTable(ctx, desc)
 		if err != nil {
 			numFailures++