CMakePM: clang-tidy fix for 'performance-implicit-conversion-in-loop'

Change-Id: I67e5adad19a3454986381c5548bbe96cf1cc1e6a
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/cmakeprojectmanager/cmakebuildsystem.cpp

@@ -1521,7 +1521,7 @@ void CMakeBuildSystem::runCTest()
                 const QJsonArray nodes = btGraph.value("nodes").toArray();
                 const QJsonArray tests = jsonObj.value("tests").toArray();
                 int counter = 0;
-                for (const QJsonValue &testVal : tests) {
+                for (const auto &testVal : tests) {
                     ++counter;
                     const QJsonObject test = testVal.toObject();
                     QTC_ASSERT(!test.isEmpty(), continue);