[sddm-theme/lock screen] Use QQC2 for the clock labels
Summary:
This patch replaces the PlasmaComponents labels in Clock.qml with QQC2 ones. This resolves the issue of the clock letters/numbers getting clipped.
BUG: 404651
FIXED-IN: 5.15.3
Test Plan:
Before and after
Reviewers: Plasma, VDG, filipf, ngraham, hein
Reviewed By: Plasma, VDG, ngraham, hein
Subscribers: mart, davidedmundson, plasma-devel
Tags: Plasma
Maniphest Tasks: T10325
Differential Revision: https://phabricator.kde.org/D19647