Remove deprecated QSS install scripts for unatended installation and replace with QtIFW 4.0.0+ CLI feature

[jmarrec]

Enhancement Request

OpenStudioApplication/ci/install_script_qtifw.qs

Line 1 in d279ff2

function Controller() {

The QSS script stuff is actually deprecated and should be totally removed, the workflow(s) that use it replaced, and documentation updated.

Detailed Description

https://doc.qt.io/qtinstallerframework/ifw-use-cases-cli.html#unattended-usage

Possible Implementation

QtIFW 4.0.0 added a CLI feature.

./OpenStudioApplication-x.y-z.exe --accept-licenses --default-answer --confirm-command --root ${installDir} install

Reported at #775 (comment)

[macumber]

Thanks @jmarrec