gnu: okular: Update to 24.05.2.
* gnu/packages/kde.scm (okular): Update to 24.05.2.
[inputs]: Remove kactivities, khtml, qtbase-5, qtspeech-5, poppler-qt5,
qtdeclarative-5, qtsvg-5, qtwayland-5, kjs, and qtx11extras; add
plasma-activities, ki18n, ktextwidgets, qtspeech, libxkbcommon,
poppler-qt6, qtdeclarative, qtsvg, and qtwayland.
[arguments]: Set #:qtbase to qtbase; Adjust check phase.
Change-Id: I27199219d9ce7aeb90708f3f25016ef89b01eddf