next.js

419246c7 - ci(workflow): upload Turbopack bytesize to datadog pipeline (#50600)

ci(workflow): upload Turbopack bytesize to datadog pipeline (#50600) ### What? This PR updates existing CI worfklow for building Turbopack (`@next/swc`), and report its bytesize per target triple as additional metrics. It will be included in datadog's pipeline execution traces. It would be better to track this per-PR, or per-commits but building all native binaries per each commit is too expensive. For now, tracking it when we deploy and actually build new release binaries.