chore(e2e): migrate Github Discovery plugin tests from RHDH

workspaces/backstage/e2e-tests/playwright.config.ts

@@ -9,6 +9,10 @@ dotenv.config({ path: `${import.meta.dirname}/.env` });
  */
 export default defineConfig({
   projects: [
+    {
+      name: "backstage-github-discovery",
+      testMatch: /tests\/specs\/github-discovery\.spec\.ts/,
+    },
     {
       name: "backstage-gitlab-discovery",
       testMatch: /tests\/specs\/gitlab-discovery\.spec\.ts/,