Rosetta x64 translation fools arch detection in installers

[ericstj]

Initial thread: #59295 (comment)

When running on M1 mac, if the installer is launched from a rosetta terminal it runs under x64 translation.

This causes the installer to falsely identify the machine as x64.

We should avoid this if we can using sysctl.proc_translated
https://developer.apple.com/documentation/apple-silicon/about-the-rosetta-translation-environment

We need to leverage this here in the host's postinstall script, as well as in the bundle authoring in arcade and installer. cc @sfoslund

[ericstj]

Here's a gist that shows modified detection and logged results: https://gist.github.com/ericstj/12c046c2142cc6134ca783324d59d4a6

[ericstj]

Fixed in dotnet/arcade#7919, dotnet/arcade#7918

[ericstj]

Also 12183cb #59485 (for mac postinstall)