Replace gitea-release plugin with curl-based release upload

Uses basic auth (droneci user) and Gitea API directly to create
the release and upload the binary asset.
Fix the golangci-lint issues

main_test.go

@@ -354,11 +354,11 @@ func TestAllFactsForNode_QueryContainsCertname(t *testing.T) {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		receivedQuery = r.URL.Query().Get("query")
 		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode([]fact{})
+		_ = json.NewEncoder(w).Encode([]fact{})
 	}))
 	defer srv.Close()
 
-	allFactsForNode(srv.URL+"/pdb/query/v4/facts", "mynode.example.com")
+	_, _ = allFactsForNode(srv.URL+"/pdb/query/v4/facts", "mynode.example.com")
 	if !strings.Contains(receivedQuery, "mynode.example.com") {
 		t.Fatalf("expected certname in query, got: %s", receivedQuery)
 	}
@@ -405,10 +405,10 @@ func TestRun_AllFacts_PrintsSortedByName(t *testing.T) {
 	cfg := config{PuppetDBURL: srv.URL + "/pdb/query/v4/facts", RoleFact: "enc_role"}
 	err := run(cfg, "node1", "", "", "", false, false, false, false, false, false, true)
 
-	w.Close()
+	_ = w.Close()
 	os.Stdout = old
 	var buf strings.Builder
-	io.Copy(&buf, r)
+	_, _ = io.Copy(&buf, r)
 	out := buf.String()
 
 	if err != nil {