test: force resigning of app

In the GitHub Actions CI, test-macos-app-sandbox.js can fail due
to the application already being signed. This commit updates
the test to handle that condition.

Refs: https://github.com/nodejs/node/pull/33944
PR-URL: https://github.com/nodejs/node/pull/34331
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

test/parallel/test-macos-app-sandbox.js

@@ -42,7 +42,7 @@ assert.strictEqual(
   child_process.spawnSync('/usr/bin/codesign', [
     '--entitlements', fixtures.path(
       'macos-app-sandbox', 'node_sandboxed.entitlements'),
-    '-s', '-',
+    '--force', '-s', '-',
     appBundlePath
   ]).status,
   0);