fix(installer): read input from process' controlling terminal

[orhun]

Description of change

Fixes the following installer error:

Detected Linux!
Checking distro...
lsb_release could not be found. Falling back to /etc/os-release
Installing with package manager is not supported
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How has this been tested? (if applicable)

I was able to reproduce this on my ARM system and now it works.

Also see: https://www.unix.com/shell-programming-and-scripting/266010-bash-how-do-read-p-inside-while-loop.html