fix: reduce verbosity of ITK module splitter. (acts-project#1976)

Reduce the verbosity of the ITK module splitter from INFO to DEBUG. This addresses part of issue
 acts-project#1975 i.e. the number of messages is reduced.

Author: goetzgaycken

Examples/Detectors/TGeoDetector/src/TGeoITkModuleSplitter.cpp

@@ -56,10 +56,10 @@ ActsExamples::TGeoITkModuleSplitter::split(
   for (const std::tuple<std::regex, std::string, bool>& split_category :
        m_splitCategories) {
     if (std::regex_match(sensorName, std::get<0>(split_category))) {
-      ACTS_INFO("Splitting " +
-                std::string(category_names[std::get<2>(split_category)]) +
-                " node " + sensorName + " using split ranges of category " +
-                std::get<1>(split_category));
+      ACTS_DEBUG("Splitting " +
+                 std::string(category_names[std::get<2>(split_category)]) +
+                 " node " + sensorName + " using split ranges of category " +
+                 std::get<1>(split_category));
       if (!std::get<2>(split_category)) {
         return ActsExamples::TGeoITkModuleSplitter::splitBarrelModule(
             gctx, detElement, m_cfg.barrelMap.at(std::get<1>(split_category)));