iOS / Android / WebAssembly have invalid [DevicePaths] Prefix in target_qt.conf when installing Qt from online installer

Sample content:

c:\Qt\6.2.0\wasm_32\bin>type target_qt.conf
[DevicePaths]
Prefix=/Users/qt/work/install/target
[Paths]
Prefix=../
HostPrefix=../../mingw81_64
HostData=../wasm_32
Sysroot=
SysrootifyPrefix=false
TargetSpec=wasm-emscripten
HostSpec=win32-g++
Documentation=../../Docs/Qt-6.2.0
Examples=../../Examples/Qt-6.2.0

Note the DevicePaths Prefix is the Coin provided install prefix.
The last time the code that generates that entry is at https://codereview.qt-project.org/c/qt/qtbase/+/318626/6/cmake/QtQmakeHelpers.cmake#133

DevicePaths are paths as they appear on device.
https://wiki.qt.io/Qmake_properties

From some quick grepping, the only place where mkspecs uses those paths are for rpath resolution, and even then only when relative rpath resolution is disabled, which are not relevant for iOS/Android/WebAssembly, but is relevant for cross-compiled linux qt (e.g. yocto). It might be yocto is patching those already.

https://github.com/qt/qtbase/blob/ad4faa25a524da8291525ca0afe2f2a65bf6b456/mkspecs/features/qt.prf#L273