Environment variables labeled "HIFI" should have a "VIRCADIA" equivalent added

[digisomni]

This will help ease the transition when we do deprecate and remove the "HIFI" variables.

[daleglass]

Some of this is already part of my CMake PRs, #936

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[daleglass]

Ongoing work

PR #1130

[stale]

Hello! Is this still an issue?

[stale]

Hello! Is this still an issue?