KDE: Update KDE Plasma to 6.5.2

Announcement: https://kde.org/announcements/plasma/6/6.5.2/

Ports changes:

*/*:

• Clean up Makefile from stale CMAKE_ARGS

x11/plasma6-plasma:

• Install Plasma Breeze style for Qt5

x11-themes/plasma6-breeze:

• Add Qt5 flavor

x11-wm/plasma6-kwin:

• Remove stale patch