[merge] with upstream

.github/workflows/nightly-debian.yml

.github/workflows/nightly-neon.yml

.github/workflows/nightly-opensuse.yml

.github/workflows/pullrequest.yml

.reuse/dep5

3rdparty/kdsingleapplication/CMakeLists.txt

...ty/kdsingleapplication/KDSingleApplicationConfig.cmake.in

3rdparty/kdsingleapplication/LICENSE.MIT.txt

3rdparty/kdsingleapplication/kdsingleapplication.cpp

3rdparty/kdsingleapplication/kdsingleapplication.h

3rdparty/kdsingleapplication/kdsingleapplication_lib.h

...y/kdsingleapplication/kdsingleapplication_localsocket.cpp

...y/kdsingleapplication/kdsingleapplication_localsocket_p.h

3rdparty/kdsingleapplication/src.pro

CHANGES-3.2

CHANGES-3.3

CMakeLists.txt

CMakeModules/ExtendedVersion.cmake

CMakeModules/KPMcoreHelper.cmake

calamares.desktop