Add qtlottie in qt6 ci

At the moment there seems to be only 1 target in qtlottie CI in Qt6, see http://coin-master.ci.qt.io/coin/integration/qt/qtlottie/tasks/1609699727

We need to enable all CI targets for qt lottie, similarly like qtnetworkauth e.g has, see http://coin-master.ci.qt.io/coin/integration/qt/qtnetworkauth/tasks/1610015128

Something similar than
https://codereview.qt-project.org/c/qt/qt3d/+/299765
https://codereview.qt-project.org/c/qt/qt3d/+/302414