[easy] Update deprecated KMessageBox API calls

Easy task for someone new to developing on Kdenlive.

The KMessageBox API deprecated several methods, which should be replaced by the given alternatives. When compiling, there are warnings such as the ones below:

kdenlive/src/dialogs/textbasededit.cpp:742:26: warning: 'questionYesNo' is deprecated: Since 5.100. Use questionTwoActions() [-Wdeprecated-declarations]
        if (KMessageBox::questionYesNo(this, i18n("Another recognition job is running. Abort it ?")) != KMessageBox::Yes) {
                         ^
kdenlive/src/bin/clipcreator.cpp:214:26: warning: 'warningYesNoList' is deprecated: Since 5.100. Use warningTwoActionsList() [-Wdeprecated-declarations]
        if (KMessageBox::warningYesNoList(QApplication::activeWindow(),
                         ^

To fix, update all of the deprecated methods, make sure these warnings are gone, open a Merge Request, and ask someone to review your merge request.