Avoiding repeated CMake executions

@dreher fyi

source/RobotAPI/libraries/armem_robot_state/client/common/VirtualRobotReader.cpp

@@ -38,7 +38,7 @@ namespace armarx::armem::robot_state
     bool
     VirtualRobotReader::synchronizeRobot(VirtualRobot::Robot& robot, const armem::Time& timestamp)
     {
-        const auto packages = armarx::CMakePackageFinder::FindAllArmarXSourcePackages();
+        const static auto packages = armarx::CMakePackageFinder::FindAllArmarXSourcePackages();
         const auto package = armarx::ArmarXDataPath::getProject(packages, robot.getFilename());
 
         const robot::RobotDescription robotDescription{