build: add GitHub Actions publishing pipeline for macOS (#42236)

* build: add publishing workflow for GHActions

* build: add test repo/bucket for uploads

* build: clean up conditionals, add macos-14-large, review comments

* build: remove host_cpu var from GCLIENT_EXTRA_ARGS

script/lib/azput.js

@@ -2,6 +2,9 @@
 const { BlobServiceClient } = require('@azure/storage-blob');
 const path = require('node:path');
 
+// TODO(vertedinde): This variable is a test variable in GHA, sending test
+// artifacts to a test account. Change to the real electron artifacts
+// storage account when ready.
 const blobServiceClient = BlobServiceClient.fromConnectionString(process.env.ELECTRON_ARTIFACTS_BLOB_STORAGE);
 
 const args = require('minimist')(process.argv.slice(2));