This PR simplifies testing on Windows by removing the need to set the QT_PLUGIN_PATH environment variable for different build configurations. For example, the paths might otherwise be:
C:/Users/hebasto/dev/bitcoin/build/vcpkg_installed/x64-windows/Qt6/plugins/for “Release”C:/Users/hebasto/dev/bitcoin/build/vcpkg_installed/x64-windows/debug/Qt6/plugins/for “Debug”