Fix golangci-lint warnings (#17598 et al) (#17668)

Backport #17598 
Backport #17606 
Backport #17608 
Backport #17609

- Since https://gitea.com/gitea/test-env/pulls/10 the golangci-lint has been upgraded and is erroring about new warnings in the code, this PR fixes those warnings.

modules/indexer/code/elastic_search.go

@@ -83,7 +83,10 @@ func NewElasticSearchIndexer(url, indexerName string) (*ElasticSearchIndexer, bo
 		indexerAliasName: indexerName,
 	}
 	exists, err := indexer.init()
-
+	if err != nil {
+		indexer.Close()
+		return nil, false, err
+	}
 	return indexer, !exists, err
 }