Convert github-sync files to use fetch-utils

GitOrigin-RevId: 5b3a40bbeac54d00d566144d5642b2b36171b239

package-lock.json

@@ -42666,6 +42666,7 @@
         "request": "^2.88.2"
       },
       "devDependencies": {
+        "@overleaf/fetch-utils": "*",
         "chai": "^4.3.6",
         "chai-as-promised": "^7.1.1",
         "mocha": "^10.2.0",
@@ -52554,6 +52555,7 @@
       "requires": {
         "@octokit/request": "^5.6.3",
         "@overleaf/access-token-encryptor": "*",
+        "@overleaf/fetch-utils": "*",
         "@overleaf/logger": "*",
         "@overleaf/metrics": "*",
         "@overleaf/o-error": "*",