autotests: Add breeze to .kde-ci.yml

Some tests need it, e.g.

FAIL!  : TestDontCrashUseractionsMenu::initTestCase() 'kwinApp()->setStyle(QStringLiteral("breeze"))' returned FALSE. ()
   Loc: [/builds/plasma/kwin/autotests/integration/dont_crash_useractions_menu.cpp(57)]

.kde-ci.yml

@@ -30,6 +30,7 @@ Dependencies:
     'frameworks/kdoctools': '@stable'
     'frameworks/krunner': '@stable'
     'frameworks/kirigami': '@stable'
+    'plasma/breeze': '@same'
     'plasma/kdecoration': '@same'
     'plasma/kscreenlocker': '@same'
     'plasma/kwayland-server': '@same'