build: fail publish when upload fatal errors (#48547)

We logged a fatal error but didn't exit with code 1 so the publish kept going. This was caught by a sanity check later down the release process but would have been quicker to fail out here.

Also adds some code to maybe workaround the underlying auth error

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Samuel Attard <sam@electronjs.org>

script/release/uploaders/upload-to-github.ts

@@ -48,7 +48,7 @@ const targetRepo = getRepo();
 const uploadUrl = `https://uploads.github.com/repos/electron/${targetRepo}/releases/${releaseId}/assets{?name,label}`;
 let retry = 0;
 
-const octokit = new Octokit({
+let octokit = new Octokit({
   authStrategy: createGitHubTokenStrategy(targetRepo),
   log: console
 });
@@ -73,6 +73,12 @@ function uploadToGitHub () {
       console.log(`Error uploading ${fileName} to GitHub, will retry.  Error was:`, err);
       retry++;
 
+      // Reset octokit in case it cached an auth error somehow
+      octokit = new Octokit({
+        authStrategy: createGitHubTokenStrategy(targetRepo),
+        log: console
+      });
+
       octokit.repos.listReleaseAssets({
         owner: ELECTRON_ORG,
         repo: targetRepo,
@@ -98,6 +104,7 @@ function uploadToGitHub () {
         }
       }).catch((getReleaseErr) => {
         console.log('Fatal: Unable to get current release assets via getRelease!  Error was:', getReleaseErr);
+        process.exitCode = 1;
       });
     } else {
       console.log(`Error retrying uploading ${fileName} to GitHub:`, err);