Bundle Rosetta for Offline Installer to avoid network dependency

[feynon]

On new Macs, the Offline Installer prompts to install the Rosetta dependency, which requires an internet connection to download. This defeats the purpose of an offline installer. However, the Rosetta installers for each macOS version can be bundled, and their combined size is only about 150 MB, making this approach feasible.

• https://tinyapps.org/blog/202103270700_backup_rosetta2.html
• https://www.alansiu.net/2021/03/24/copying-the-rosetta-2-installer-for-offline-installations/
• https://tinyapps.org/blog/rosetta2-archive.html