ci(run/system-package): onboard to new testing

Author: glasnt

.github/config/nodejs-prod.jsonc

@@ -95,7 +95,6 @@
     "recaptcha_enterprise/snippets", // Cannot use import statement outside a module
     "run/idp-sql", // Error: Invalid contents in the credentials file
     "run/markdown-preview/editor", // Error: could not create an identity token: Cannot fetch ID token in this environment, use GCE or set the GOOGLE_APPLICATION_CREDENTIALS environment variable to a service account credentials JSON file
-    "run/system-package", // Error: ENOENT: no such file or directory, access '/usr/bin/dot'
     "scheduler", // SyntaxError: Cannot use import statement outside a module
     "speech", // AssertionError: expected 'Transcription:  Okay, I\'m here.\n Hi…' to match /Terrific. It's on the way./
     "storagetransfer", // CredentialsError: Missing credentials in config, if using AWS_CONFIG_FILE, set AWS_SDK_LOAD_CONFIG=1

run/system-package/test/app.test.js

@@ -14,9 +14,13 @@
 
 'use strict';
 
+const {exec} = require('child_process');
 const path = require('path');
 const supertest = require('supertest');
 
+// Manually install system package in testing environment
+exec("apt update && apt install graphviz -y")
+
 describe('Unit Tests', () => {
   const app = require(path.join(__dirname, '..', 'app'));
   const request = supertest(app);