QtKeychain does not work with qt_generate_deploy_app_script

[redstrate]

I tried to deploy an application on Windows using the new qt_generate_deploy_app_script function, and it ended up failing:

Unable to find dependent libraries of C:\Qt\6.7.0\msvc2019_64\bin\qt6keychaind.dll :Cannot open 'C:/Qt/6.7.0/msvc2019_64/bin/qt6keychaind.dll': The system cannot find the file specified.
CMake Error at C:/Qt/6.7.0/msvc2019_64/lib/cmake/Qt6Core/Qt6CoreDeploySupport.cmake:528 (message):
  Executing C:/Qt/6.7.0/msvc2019_64/bin/windeployqt.exe failed: 1
Call Stack (most recent call first):
  .qt/deploy_astra_5e627c233f.cmake:5 (qt6_deploy_runtime_dependencies)
  launcher/cmake_install.cmake:40 (include)
  cmake_install.cmake:42 (include)

Not 100% sure why it's doing this yet, but I would suppose maybe it thinks the library name starting with "qt6" is trying to copy it from the Qt6 dir?

[redstrate]

Aha I just found #226 because this is actually an underlying windeploy issue.

[redstrate]

Hold on, that seems to have been accidentally lost and so you can no longer set it externally. Was this intentional?