Changes

Qt6 (#12485)

* OMEdit: Qt6 compatibility

* OMNotebook: Qt6 support

* OMShell: Qt6 support

* OMPlot: Bump qwt

* OMPlot: Qt6 support

* Fixed OMShell

Allow compiling OMShell with Qt6 on Windows

* Allow compiling OMPlot with Qt6 on Windows

* Fixed OMNotebook chapter numbers visibility and opening of notebooks

* Compile OMEdit with qt6 on Windows

* Update OMEdit testsuite for qt6

Compile qtclients on Windows with qt6 in the pipeline

* Add a new pipeline stage Win/UCRT64-qt6

* Fix build

* Fix libs copying and compile omoptim

Update OMDev

* Update OMOptim and OMSens_Qt submodules

* Update OMOptim

* Added a new stage cmake-jammy-gcc-qt6 in pipeline

* Remove the cmake-jammy-gcc-qt6 for now

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Co-authored-by: Julien Schueller <schueller@phimeca.com>
Co-authored-by: Adeel Asghar <adeel.asghar@liu.se>